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on august 21 , 2017 , the mainland united states will experience an event that hasn ’ t happened across the entire country in about a century - a total solar eclipse ! a solar eclipse is one of the most spectacular events you can ever see . the sky goes dark , and the stars come out just like it is nighttime . ancient ... | sometimes when the three objects line up we get an eclipse . when the moon is between the sun and the earth during the new moon phase , we can get a solar eclipse ( see figure 1 below ) . it seems like we should get a solar eclipse every month , but we do n't . | when the moon rotates does it move further out each year ? |
on august 21 , 2017 , the mainland united states will experience an event that hasn ’ t happened across the entire country in about a century - a total solar eclipse ! a solar eclipse is one of the most spectacular events you can ever see . the sky goes dark , and the stars come out just like it is nighttime . ancient ... | check out the images below . can i look directly at the solar eclipse ? never look directly at the sun . | is it safe to look at the lunar eclipse ? |
on august 21 , 2017 , the mainland united states will experience an event that hasn ’ t happened across the entire country in about a century - a total solar eclipse ! a solar eclipse is one of the most spectacular events you can ever see . the sky goes dark , and the stars come out just like it is nighttime . ancient ... | check out the images below . can i look directly at the solar eclipse ? never look directly at the sun . | is there any other way to look at the solor eclipse without the glasses ? |
on august 21 , 2017 , the mainland united states will experience an event that hasn ’ t happened across the entire country in about a century - a total solar eclipse ! a solar eclipse is one of the most spectacular events you can ever see . the sky goes dark , and the stars come out just like it is nighttime . ancient ... | never ! doing so will cause blindness . however , you may view the solar eclipse using special solar eclipse glasses or by making a solar eclipse viewer yourself at home . check for recommendations from nasa . | is it okay to close your eyes and adjust your head so that it 's facing a partial eclipse without special glasses , or will that cause blindness , too ? |
on august 21 , 2017 , the mainland united states will experience an event that hasn ’ t happened across the entire country in about a century - a total solar eclipse ! a solar eclipse is one of the most spectacular events you can ever see . the sky goes dark , and the stars come out just like it is nighttime . ancient ... | doing so will cause blindness . however , you may view the solar eclipse using special solar eclipse glasses or by making a solar eclipse viewer yourself at home . check for recommendations from nasa . | will i be able to see this solar eclipse from the uk ? |
on august 21 , 2017 , the mainland united states will experience an event that hasn ’ t happened across the entire country in about a century - a total solar eclipse ! a solar eclipse is one of the most spectacular events you can ever see . the sky goes dark , and the stars come out just like it is nighttime . ancient ... | can i look directly at the solar eclipse ? never look directly at the sun . never . | what happens if you stack polarized lens ( lets say more than 5 ) on top of each other and look at the sun ? |
on august 21 , 2017 , the mainland united states will experience an event that hasn ’ t happened across the entire country in about a century - a total solar eclipse ! a solar eclipse is one of the most spectacular events you can ever see . the sky goes dark , and the stars come out just like it is nighttime . ancient ... | doing so will cause blindness . however , you may view the solar eclipse using special solar eclipse glasses or by making a solar eclipse viewer yourself at home . check for recommendations from nasa . | how often does each type of solar eclipse happen ? |
on august 21 , 2017 , the mainland united states will experience an event that hasn ’ t happened across the entire country in about a century - a total solar eclipse ! a solar eclipse is one of the most spectacular events you can ever see . the sky goes dark , and the stars come out just like it is nighttime . ancient ... | doing so will cause blindness . however , you may view the solar eclipse using special solar eclipse glasses or by making a solar eclipse viewer yourself at home . check for recommendations from nasa . | how often does a full solar eclipse happen ? |
introduction in this article we take an intuitive look at the natural response of a resistor-inductor-capacitor circuit $ ( \text { rlc ) } $ . this is the last circuit we 'll analyze with the full differential equation treatment , which we will do in two follow-on articles . the $ \text { rlc } $ circuit is representa... | over at the inductor there is a current flowing , even though the voltage is at or near $ 0 $ . the energy stored in the inductor 's magnetic field tends to keep the current flowing . ( current does not abruptly drop to $ 0 $ when the inductor voltage reaches $ 0 $ . | i 'm tempted to presume that if the circuit was made up of real-world components , some energy would be lost as heat in the inductor as well , as the energy alternates between being stored in the magnetic field and being used to direct charge ; is this correct ? |
introduction in this article we take an intuitive look at the natural response of a resistor-inductor-capacitor circuit $ ( \text { rlc ) } $ . this is the last circuit we 'll analyze with the full differential equation treatment , which we will do in two follow-on articles . the $ \text { rlc } $ circuit is representa... | if we place a starting charge on the capacitor and then close the switch , that charge will slosh back and forth from one plate of the capacitor to the other , passing through the inductor and resistor in both directions . each cycle of oscillation will be a little less than the previous , because energy is lost when t... | what percentage of energy is lost during a given transition ) ? |
the group of artists known as abstract expressionists emerged in the united states in the years following world war ii . as the term suggests , their work was characterized by non-objective imagery that appeared emotionally charged with personal meaning . the artists , however , rejected these implications of the name ... | barnet newman , an artist associated with the movement , wrote : `` we felt the moral crisis of a world in shambles , a world destroyed by a great depression and a fierce world war , and it was impossible at that time to paint the kind of paintings that we were doing—flowers , reclining nudes , and people playing the c... | what was so different about this era that made early `` pioneer 's '' styles so impossible to study and successfully replicate ? |
the group of artists known as abstract expressionists emerged in the united states in the years following world war ii . as the term suggests , their work was characterized by non-objective imagery that appeared emotionally charged with personal meaning . the artists , however , rejected these implications of the name ... | for artists like rothko , these images were meant to encourage meditation and personal reflection . adolph gottlieb , writing with rothko and newman in 1943 , explained , “ we favor the simple expression of the complex thought. ” ** barnett newman ’ s vir , heroicus , sublimis illustrates this lofty goal . in this pain... | why was pollock and newman important for this movement ? |
the remaining piece of merge sort is the merge function , which merges two adjacent sorted subarrays , array [ p..q ] and array [ q+1..r ] into a single sorted subarray in array [ p..r ] . we 'll see how to construct this function so that it 's as efficient as possible . let 's say that the two subarrays have a total o... | we may overwrite the grayed numbers at will . next , we merge the two sorted subarrays , now in lowhalf and highhalf , back into array [ p..r ] . we should put the smallest value in either of the two subarrays into array [ p ] . | would the efficiency or complexity be any different if we did not use `` temporary arrays '' , but instead simply : - insertion sort the already-sorted lowhalf into the already-sorted highhalf ? |
the remaining piece of merge sort is the merge function , which merges two adjacent sorted subarrays , array [ p..q ] and array [ q+1..r ] into a single sorted subarray in array [ p..r ] . we 'll see how to construct this function so that it 's as efficient as possible . let 's say that the two subarrays have a total o... | the remaining piece of merge sort is the merge function , which merges two adjacent sorted subarrays , array [ p..q ] and array [ q+1..r ] into a single sorted subarray in array [ p..r ] . we 'll see how to construct this function so that it 's as efficient as possible . | is the condition of the while loops right ? |
the remaining piece of merge sort is the merge function , which merges two adjacent sorted subarrays , array [ p..q ] and array [ q+1..r ] into a single sorted subarray in array [ p..r ] . we 'll see how to construct this function so that it 's as efficient as possible . let 's say that the two subarrays have a total o... | the remaining piece of merge sort is the merge function , which merges two adjacent sorted subarrays , array [ p..q ] and array [ q+1..r ] into a single sorted subarray in array [ p..r ] . we 'll see how to construct this function so that it 's as efficient as possible . let 's say that the two subarrays have a total o... | here is my `` merge '' function ... how can i get step 1 to mark complete ? |
the remaining piece of merge sort is the merge function , which merges two adjacent sorted subarrays , array [ p..q ] and array [ q+1..r ] into a single sorted subarray in array [ p..r ] . we 'll see how to construct this function so that it 's as efficient as possible . let 's say that the two subarrays have a total o... | the remaining piece of merge sort is the merge function , which merges two adjacent sorted subarrays , array [ p..q ] and array [ q+1..r ] into a single sorted subarray in array [ p..r ] . we 'll see how to construct this function so that it 's as efficient as possible . | what should the for loop condition be ? |
the remaining piece of merge sort is the merge function , which merges two adjacent sorted subarrays , array [ p..q ] and array [ q+1..r ] into a single sorted subarray in array [ p..r ] . we 'll see how to construct this function so that it 's as efficient as possible . let 's say that the two subarrays have a total o... | once one of lowhalf and highhalf has had all its elements copied back into array , copy each remaining untaken element from the other temporary array back into array . how many lines of code do we need to execute for each of these steps ? it 's a constant number per element . | final code returns correct results but khan site will not grade or advance ? |
the remaining piece of merge sort is the merge function , which merges two adjacent sorted subarrays , array [ p..q ] and array [ q+1..r ] into a single sorted subarray in array [ p..r ] . we 'll see how to construct this function so that it 's as efficient as possible . let 's say that the two subarrays have a total o... | the remaining piece of merge sort is the merge function , which merges two adjacent sorted subarrays , array [ p..q ] and array [ q+1..r ] into a single sorted subarray in array [ p..r ] . we 'll see how to construct this function so that it 's as efficient as possible . let 's say that the two subarrays have a total o... | how to write a function to run in linear time and use node to perform the above merge sort ? |
the remaining piece of merge sort is the merge function , which merges two adjacent sorted subarrays , array [ p..q ] and array [ q+1..r ] into a single sorted subarray in array [ p..r ] . we 'll see how to construct this function so that it 's as efficient as possible . let 's say that the two subarrays have a total o... | as long as some elements are untaken in both lowhalf and highhalf , compare the first two untaken elements and copy the smaller one back into array . once one of lowhalf and highhalf has had all its elements copied back into array , copy each remaining untaken element from the other temporary array back into array . ho... | why do we use three separate while loops instead of condensing the code to finish off the array once one sub-array has been exhausted inside the first while loop ? |
the remaining piece of merge sort is the merge function , which merges two adjacent sorted subarrays , array [ p..q ] and array [ q+1..r ] into a single sorted subarray in array [ p..r ] . we 'll see how to construct this function so that it 's as efficient as possible . let 's say that the two subarrays have a total o... | the remaining piece of merge sort is the merge function , which merges two adjacent sorted subarrays , array [ p..q ] and array [ q+1..r ] into a single sorted subarray in array [ p..r ] . we 'll see how to construct this function so that it 's as efficient as possible . | is there anything anyone can do to suggest a fix ? |
the remaining piece of merge sort is the merge function , which merges two adjacent sorted subarrays , array [ p..q ] and array [ q+1..r ] into a single sorted subarray in array [ p..r ] . we 'll see how to construct this function so that it 's as efficient as possible . let 's say that the two subarrays have a total o... | we have to examine each of the elements in order to merge them together , and so the best we can hope for would be a merging time of $ \theta ( n ) $ . indeed , we 'll see how to merge a total of $ n $ elements in $ \theta ( n ) $ time . in order to merge the sorted subarrays array [ p..q ] and array [ q+1..r ] and hav... | hey , i have an issue that 's driving me insane , i have finished the challenge and got it right , but i still ca n't fully wrap my head around how the implementation works , i know how merge sort works but the implementation of it using recursion is literally driving me nuts , i just ca n't seem to know what 's going ... |
the remaining piece of merge sort is the merge function , which merges two adjacent sorted subarrays , array [ p..q ] and array [ q+1..r ] into a single sorted subarray in array [ p..r ] . we 'll see how to construct this function so that it 's as efficient as possible . let 's say that the two subarrays have a total o... | we may overwrite the grayed numbers at will . next , we merge the two sorted subarrays , now in lowhalf and highhalf , back into array [ p..r ] . we should put the smallest value in either of the two subarrays into array [ p ] . | in step two : why does the code works only with lower half and upper half sorted ? |
the remaining piece of merge sort is the merge function , which merges two adjacent sorted subarrays , array [ p..q ] and array [ q+1..r ] into a single sorted subarray in array [ p..r ] . we 'll see how to construct this function so that it 's as efficient as possible . let 's say that the two subarrays have a total o... | where must the next value to copy back into array reside ? it 's either first untaken element in lowhalf ( lowhalf [ 0 ] ) or the first untaken element in highhalf ( highhalf [ 1 ] ) . with one comparison , we determine that lowhalf [ 0 ] is smaller , and so we copy it into array [ k ] and increment k and i : next , we... | it says that the first while loop is taking too long to run , but i 'm not sure of any other way of writing the parameters ? |
siena : a city overlooked ? for centuries , siena ’ s role in the history of european art was underappreciated . this is partly because its moment of greatest influence occurred just before the renaissance , a period commonly associated with the nearby city of florence ( both florence and siena were independent city-st... | siena : a city overlooked ? for centuries , siena ’ s role in the history of european art was underappreciated . | according to the met 's online essay on painting in siena , which statement is not true of duccio 's maesta ? |
siena : a city overlooked ? for centuries , siena ’ s role in the history of european art was underappreciated . this is partly because its moment of greatest influence occurred just before the renaissance , a period commonly associated with the nearby city of florence ( both florence and siena were independent city-st... | building on the legacy of duccio , simone was also influenced by the elongated , swaying figures and elaborate architectural forms of northern european art . on the other hand , his paintings show a bit more of the kind of careful observation of the world around him that we might associate with giotto , the leading flo... | zucker and harris , which statement is not true of giotto 's paintings in the arena chapel ? |
key points homeotic genes are master regulator genes that direct the development of particular body segments or structures . when homeotic genes are overactivated or inactivated by mutations , body structures may develop in the wrong place—sometimes dramatically so ! most animal homeotic genes encode transcription fact... | when homeotic genes are overactivated or inactivated by mutations , body structures may develop in the wrong place—sometimes dramatically so ! most animal homeotic genes encode transcription factor proteins that contain a region called the homeodomain and are called hox genes . hox genes are turned on by a cascade of r... | what are the similarities between animal and plant homeotic genes ? |
key points homeotic genes are master regulator genes that direct the development of particular body segments or structures . when homeotic genes are overactivated or inactivated by mutations , body structures may develop in the wrong place—sometimes dramatically so ! most animal homeotic genes encode transcription fact... | this type of mutation causes legs to grow from the fly 's head in place of antennae ! in other words , the gene activates its normal , second-segment leg development program , but in the wrong part of the fly. $ ^1 $ another fly homeotic gene with dramatic effects is the ultrabithorax gene . this gene is expressed stro... | what does it mean to duplicate a gene ? |
the so-called maison carrée or “ square house ” is an ancient roman temple located in nîmes in southern france . nîmes was founded as a roman colony ( colonia nemausus ) during the first century b.c.e . the maison carrée is an extremely well preserved ancient roman building and represents a nearly textbook example of a... | while not especially common within italy during the time of the iulio-claudians , the worship of the emperor and the imperial family was more commonplace in the provinces of the roman empire . the late first century b.c.e . temple of augustus and livia located in vienne , france ( an ancient settlement of the allobroge... | approximately what period was the `` c '' in latin pronounced like an `` s '' ? |
hadrian ( reigned 117-138 c.e . ) , once a tribune ( staff officer ) in three different legions of the roman army and commander of a legion in one of trajan ’ s wars , was often shown in military uniform . he was clearly keen to project the image of an ever-ready soldier , but other conclusions have been drawn from his... | he built defensive barriers in germany and northern africa . rome ’ s first emperor , augustus ( reigned 27 b.c.e.– 14 c.e . ) , had also suffered severe military setbacks , and took the decision to stop expanding the empire . | why are you choosing to use the terms b.c.e and c.e instead of bc and ad ? |
hadrian ( reigned 117-138 c.e . ) , once a tribune ( staff officer ) in three different legions of the roman army and commander of a legion in one of trajan ’ s wars , was often shown in military uniform . he was clearly keen to project the image of an ever-ready soldier , but other conclusions have been drawn from his... | hadrian 's travels hadrian is also famous as the emperor who built the eighty-mile-long wall across britain , from the solway firth to the river tyne at wallsend : `` to separate the barbarians from the romans '' in the words of his biographer . this head comes from a statue of hadrian that probably stood in roman lond... | where was the statue of hadrian ( from which the bronze head came ) ? |
hadrian ( reigned 117-138 c.e . ) , once a tribune ( staff officer ) in three different legions of the roman army and commander of a legion in one of trajan ’ s wars , was often shown in military uniform . he was clearly keen to project the image of an ever-ready soldier , but other conclusions have been drawn from his... | this influenced fashion and such representations can assist the modern archaeologist and art-historian . for example , beards became fashionable after the accession of hadrian , and the hairstyles of empresses and other imperial women may be seen in private portraiture and decorative art , even in remote provinces such... | why is there the hairstyles of women changed but it never said who changed it ? |
hadrian ( reigned 117-138 c.e . ) , once a tribune ( staff officer ) in three different legions of the roman army and commander of a legion in one of trajan ’ s wars , was often shown in military uniform . he was clearly keen to project the image of an ever-ready soldier , but other conclusions have been drawn from his... | hadrian ( reigned 117-138 c.e . ) , once a tribune ( staff officer ) in three different legions of the roman army and commander of a legion in one of trajan ’ s wars , was often shown in military uniform . | how do we know that this torso from cyrene at the picture belongs to hadrian ? |
hadrian ( reigned 117-138 c.e . ) , once a tribune ( staff officer ) in three different legions of the roman army and commander of a legion in one of trajan ’ s wars , was often shown in military uniform . he was clearly keen to project the image of an ever-ready soldier , but other conclusions have been drawn from his... | hadrian ( reigned 117-138 c.e . ) , once a tribune ( staff officer ) in three different legions of the roman army and commander of a legion in one of trajan ’ s wars , was often shown in military uniform . | why does such an old artifact have an impact on society today ? |
imperial patronage worship and power struggles , enlightenment and suicide—the 2300 caves and niches filled with buddhist art at longmen in china has witnessed it all . the steep limestone cliffs extend for almost a mile and contain approximately 110,000 buddhist stone statues , 60 stupas ( hemispherical structures con... | the style of the reliefs may be inspired by secular painting , since the figures all appear very gracious and solemn.they are clad in chinese court robes and look genuinely chinese—mission accomplished for the northern wei ! tang dynasty the tang dynasty ( 618–907 c.e . ) is considered the age of `` international buddh... | during the tang dynasty when statues were made in the longmen caves , did the artists convert to buddhism or born into it ? |
imperial patronage worship and power struggles , enlightenment and suicide—the 2300 caves and niches filled with buddhist art at longmen in china has witnessed it all . the steep limestone cliffs extend for almost a mile and contain approximately 110,000 buddhist stone statues , 60 stupas ( hemispherical structures con... | the style of the reliefs may be inspired by secular painting , since the figures all appear very gracious and solemn.they are clad in chinese court robes and look genuinely chinese—mission accomplished for the northern wei ! tang dynasty the tang dynasty ( 618–907 c.e . ) is considered the age of `` international buddh... | and why did they make statues in these caves during the tang dynasty ? |
imperial patronage worship and power struggles , enlightenment and suicide—the 2300 caves and niches filled with buddhist art at longmen in china has witnessed it all . the steep limestone cliffs extend for almost a mile and contain approximately 110,000 buddhist stone statues , 60 stupas ( hemispherical structures con... | across from the entry is the most significant devotional grouping—a pentad ( five figures—see image above ) . the central buddha , seated on a lion throne , is generally identified as shakyamuni ( the historical buddha ) , although some scholars identify him as maitreya ( the buddha of the future ) based on the `` givi... | why did they choose to carve the buddha statues and temples on the cliffs instead of just build them flat ground ? |
imperial patronage worship and power struggles , enlightenment and suicide—the 2300 caves and niches filled with buddhist art at longmen in china has witnessed it all . the steep limestone cliffs extend for almost a mile and contain approximately 110,000 buddhist stone statues , 60 stupas ( hemispherical structures con... | in contrast to the northern wei style seen on the pentad , the sinuous and dynamic surface decoration displays chinese style . the northern wei craftsmen were able to marry two different aesthetics in one cave temple . two relief carvings of imperial processions once flanked the doorway of the cave entrance . | could someone please explain to me the different types of buddhas the essay mentions ? |
imperial patronage worship and power struggles , enlightenment and suicide—the 2300 caves and niches filled with buddhist art at longmen in china has witnessed it all . the steep limestone cliffs extend for almost a mile and contain approximately 110,000 buddhist stone statues , 60 stupas ( hemispherical structures con... | the centers of buddhism in china were invigorated by these travels , and important developments in buddhist thought and practice originated in china at this time . fengxian temple this imposing group of nine monumental images carved into the hard , gray limestone of fengxian temple at longmen is a spectacular display o... | in the fengxian temple , longmen grottos , was there a specific reason why the statues were carved into ( the ) rock ? |
portraits were once rare we live in a culture that is so saturated with images , it may be difficult to imagine a time when only the wealthiest people had their likeness captured . the weathy merchants of renaissance florence could commission a portrait , but even they would likely only have a single portrait painted d... | the background had been painted over , but when the painting was cleaned , scientific analysis revealed that the copy was likely painted by another artist who sat beside leonardo and copied his work , brush-stroke by brush-stroke . the copy gives us an idea of what the mona lisa might look like if layers of yellowed va... | why does moana lisa have no eye brows ? |
portraits were once rare we live in a culture that is so saturated with images , it may be difficult to imagine a time when only the wealthiest people had their likeness captured . the weathy merchants of renaissance florence could commission a portrait , but even they would likely only have a single portrait painted d... | the background had been painted over , but when the painting was cleaned , scientific analysis revealed that the copy was likely painted by another artist who sat beside leonardo and copied his work , brush-stroke by brush-stroke . the copy gives us an idea of what the mona lisa might look like if layers of yellowed va... | why does mona lisa 's eyes look dreary when they put the filter on the painting ? |
portraits were once rare we live in a culture that is so saturated with images , it may be difficult to imagine a time when only the wealthiest people had their likeness captured . the weathy merchants of renaissance florence could commission a portrait , but even they would likely only have a single portrait painted d... | in addition , portraits generally took a long time to paint , and the subject would commonly have to sit for hours or days , while the artist captured their likeness . the most recognized painting in the world the mona lisa was originally this type of portrait , but over time its meaning has shifted and it has become a... | why such detail is there in the painting of the net over the face ? |
portraits were once rare we live in a culture that is so saturated with images , it may be difficult to imagine a time when only the wealthiest people had their likeness captured . the weathy merchants of renaissance florence could commission a portrait , but even they would likely only have a single portrait painted d... | portraits were once rare we live in a culture that is so saturated with images , it may be difficult to imagine a time when only the wealthiest people had their likeness captured . the weathy merchants of renaissance florence could commission a portrait , but even they would likely only have a single portrait painted d... | what is the significance of the net historically ? |
overview gold , silver , and furs attracted european exploration , colonization , and competition in the new world . rivalries between european nations were often rooted in religious or political feuds taking place in europe , yet these tensions played out in the theater of the new world . the spanish lost their strong... | determined to imperil protestantism , king philip of spain assembled a massive force of over thirty thousand men and 130 ships , and sent this giant navy , known as the spanish armada , towards england and holland . but the skilled english navy and a maritime storm destroyed the fleet in 1588 . the defeat of the spanis... | where there burn marks , destroyed buildings , dead bodies , anything ? |
overview gold , silver , and furs attracted european exploration , colonization , and competition in the new world . rivalries between european nations were often rooted in religious or political feuds taking place in europe , yet these tensions played out in the theater of the new world . the spanish lost their strong... | overview gold , silver , and furs attracted european exploration , colonization , and competition in the new world . rivalries between european nations were often rooted in religious or political feuds taking place in europe , yet these tensions played out in the theater of the new world . | who was the animal skinners who that traded animal skin for other things ? |
overview gold , silver , and furs attracted european exploration , colonization , and competition in the new world . rivalries between european nations were often rooted in religious or political feuds taking place in europe , yet these tensions played out in the theater of the new world . the spanish lost their strong... | cabot sailed from england that year and explored maine and nova scotia . thereafter , english fishermen routinely crossed the atlantic to fish the rich waters off the east coast . however , english colonization efforts in the 1500s were closer to home , as england devoted its energy to the colonization of ireland . | what did the fishermen catch in the rich waters ? |
key points carbon is an essential element in the bodies of living organisms . it is also economically important to modern humans , in the form of fossil fuels . carbon dioxide— $ \text { co } _2 $ —from the atmosphere is taken up by photosynthetic organisms and used to make organic molecules , which travel through food... | this increase in $ \text { co } _2 $ levels affects earth 's climate and is a major environmental concern worldwide . let 's take a look at the carbon cycle and see how atmospheric $ \text { co } _2 $ and carbon use by living organisms fit into the bigger picture of carbon cycling . the carbon cycle the carbon cycle is... | what changes in the state of a carbon atom when i travels through the carbon cycle ? |
key points carbon is an essential element in the bodies of living organisms . it is also economically important to modern humans , in the form of fossil fuels . carbon dioxide— $ \text { co } _2 $ —from the atmosphere is taken up by photosynthetic organisms and used to make organic molecules , which travel through food... | longterm storage of organic carbon occurs when matter from living organisms is buried deep underground or sinks to the bottom of the ocean and forms sedimentary rock . volcanic activity and , more recently , human burning of fossil fuels bring this stored carbon back into the carbon cycle . although the formation of fo... | does the carbon cycle happen in human bones ? |
key points carbon is an essential element in the bodies of living organisms . it is also economically important to modern humans , in the form of fossil fuels . carbon dioxide— $ \text { co } _2 $ —from the atmosphere is taken up by photosynthetic organisms and used to make organic molecules , which travel through food... | when in the atmosphere , it traps heat and keeps it from radiating into space . based on extensive evidence , scientists think that elevated levels of $ \text { co } _2 $ and other greenhouse gases are causing pronounced changes in earth 's climate . without decisive changes to reduce emissions , earth 's temperature i... | where can i find mathematical evidence that matter is recycled in ecosystem ? |
key points carbon is an essential element in the bodies of living organisms . it is also economically important to modern humans , in the form of fossil fuels . carbon dioxide— $ \text { co } _2 $ —from the atmosphere is taken up by photosynthetic organisms and used to make organic molecules , which travel through food... | the level of carbon dioxide in the atmosphere is influenced by the reservoir of carbon in the oceans and vice versa . carbon dioxide from the atmosphere dissolves in water and reacts with water molecules in the following reactions : $ \text { co } _2 + \text h_2\text o \ : \ : \rightleftharpoons \ : \ : \text h_2\text ... | what is the current state of the carbonate budget ? |
key points : there were three models for how organisms might replicate their dna : semi-conservative , conservative , and dispersive . the semi-conservative model , in which each strand of dna serves as a template to make a new , complementary strand , seemed most likely based on dna 's structure . the models were test... | they then measured the density of the dna ( and , indirectly , its $ ^ { 15 } \text n $ and $ ^ { 14 } \text n $ content ) using density gradient centrifugation . this method separates molecules such as dna into bands by spinning them at high speeds in the presence of another molecule , such as cesium chloride , that f... | why is cesium chloride used ? |
key points : there were three models for how organisms might replicate their dna : semi-conservative , conservative , and dispersive . the semi-conservative model , in which each strand of dna serves as a template to make a new , complementary strand , seemed most likely based on dna 's structure . the models were test... | after many generations growing in the $ ^ { 15 } \text n $ medium , the nitrogenous bases of the bacteria 's dna were all labeled with heavy $ ^ { 15 } \text n $ . then , the bacteria were switched to medium containing a `` light '' $ ^ { 14 } \text n $ isotope and allowed to grow for several generations . dna made aft... | what would have happened if they grew the bacteria in the light isotope and then introduced it to the heavy isotope ? |
key points : there were three models for how organisms might replicate their dna : semi-conservative , conservative , and dispersive . the semi-conservative model , in which each strand of dna serves as a template to make a new , complementary strand , seemed most likely based on dna 's structure . the models were test... | then , the bacteria were switched to medium containing a `` light '' $ ^ { 14 } \text n $ isotope and allowed to grow for several generations . dna made after the switch would have to be made up of $ ^ { 14 } \text n $ , as this would have been the only nitrogen available for dna synthesis . meselson and stahl knew how... | what would the vial layers and densities look like ? |
key points : there were three models for how organisms might replicate their dna : semi-conservative , conservative , and dispersive . the semi-conservative model , in which each strand of dna serves as a template to make a new , complementary strand , seemed most likely based on dna 's structure . the models were test... | dispersive replication . in the dispersive model , dna replication results in two dna molecules that are mixtures , or “ hybrids , ” of parental and daughter dna . in this model , each individual strand is a patchwork of original and new dna . | if most of the dna contains 14n in its 'normal ' state , why not just remove the small amount of dna containing 15n ? |
key points : there were three models for how organisms might replicate their dna : semi-conservative , conservative , and dispersive . the semi-conservative model , in which each strand of dna serves as a template to make a new , complementary strand , seemed most likely based on dna 's structure . the models were test... | what burning questions might be on your mind , and on the minds of other scientists ? one big question concerned dna replication . the structure of the dna double helix provided a tantalizing hint about how copying might take place $ ^ { 1,2 } $ . | what does `` one round of replication '' mean ? |
key points : there were three models for how organisms might replicate their dna : semi-conservative , conservative , and dispersive . the semi-conservative model , in which each strand of dna serves as a template to make a new , complementary strand , seemed most likely based on dna 's structure . the models were test... | spoiler alert : the answer is yes ! in this article , we 'll look at a famous experiment , sometimes called `` the most beautiful experiment in biology , '' that established the basic mechanism of dna replication as semi-conservative—that is , as producing dna molecules containing one new and one old strand $ ^3 $ . th... | why nitrogen only uses for this experiment ? |
key points : there were three models for how organisms might replicate their dna : semi-conservative , conservative , and dispersive . the semi-conservative model , in which each strand of dna serves as a template to make a new , complementary strand , seemed most likely based on dna 's structure . the models were test... | dispersive replication . in the dispersive model , dna replication results in two dna molecules that are mixtures , or “ hybrids , ” of parental and daughter dna . in this model , each individual strand is a patchwork of original and new dna . | what do you mean by `` dna from the first four generations '' ? |
key points : there were three models for how organisms might replicate their dna : semi-conservative , conservative , and dispersive . the semi-conservative model , in which each strand of dna serves as a template to make a new , complementary strand , seemed most likely based on dna 's structure . the models were test... | dispersive replication . in the dispersive model , dna replication results in two dna molecules that are mixtures , or “ hybrids , ” of parental and daughter dna . in this model , each individual strand is a patchwork of original and new dna . | how to calculate density of a dna ? |
key points : there were three models for how organisms might replicate their dna : semi-conservative , conservative , and dispersive . the semi-conservative model , in which each strand of dna serves as a template to make a new , complementary strand , seemed most likely based on dna 's structure . the models were test... | conservative replication . in this model , dna replication results in one molecule that consists of both original dna strands ( identical to the original dna molecule ) and another molecule that consists of two new strands ( with exactly the same sequences as the original molecule ) . dispersive replication . | is n't it necessary that every new dna molecule would have half part of the older one and half the copy ? |
key points : there were three models for how organisms might replicate their dna : semi-conservative , conservative , and dispersive . the semi-conservative model , in which each strand of dna serves as a template to make a new , complementary strand , seemed most likely based on dna 's structure . the models were test... | results of the experiment when dna from the first four generations of e. coli was analyzed , it produced the pattern of bands shown in the figure below : what did this result tell meselson and stahl ? let 's walk through the first few generations , which provide the key information . generation 0 dna isolated from cell... | could you give the ratios for n14 , n15-n15 , and n15 for generations 0-4 ? |
this article includes a lot of function composition . if you need a review on this subject , we recommend that you go here before reading this article . inverse functions , in the most general sense , are functions that `` reverse '' each other . for example , if a function takes $ a $ to $ b $ , then the inverse must ... | example 2 : functions $ f $ and $ g $ are not inverses if $ f ( g ( x ) ) $ or $ g ( f ( x ) ) $ is not equal to $ x $ , then $ f $ and $ g $ can not be inverses . let 's try this for $ f ( x ) =5x-7 $ and $ g ( x ) =\dfrac { x } { 5 } +7 $ . $ f ( g ( x ) ) $ | $ \qquad g ( f ( x ) ) $ : - : | : - : $ \begin { align }... | how did 5 ( x/5 +7 ) -7 become x+35-7 ? |
this article includes a lot of function composition . if you need a review on this subject , we recommend that you go here before reading this article . inverse functions , in the most general sense , are functions that `` reverse '' each other . for example , if a function takes $ a $ to $ b $ , then the inverse must ... | but for two functions to be inverses , we have to show that this happens for all possible inputs regardless of the order in which $ f $ and $ g $ are applied . this gives rise to the inverse composition rule . the inverse composition rule these are the conditions for two functions $ f $ and $ g $ to be inverses : $ f (... | do we actually need to know the inverse composition rule , like when we have to memorize theorems for geometry tests , do we need to know the composition rule as a mandatory thing ? |
this article includes a lot of function composition . if you need a review on this subject , we recommend that you go here before reading this article . inverse functions , in the most general sense , are functions that `` reverse '' each other . for example , if a function takes $ a $ to $ b $ , then the inverse must ... | example 1 : functions $ f $ and $ g $ are inverses let 's use the inverse composition rule to verify that $ f $ and $ g $ above are indeed inverse functions . recall that $ f ( x ) =\dfrac { x+1 } { 3 } $ and $ g ( x ) =3x-1 $ . let 's find $ f ( g ( x ) ) $ and $ g ( f ( x ) ) $ . $ f ( g ( x ) ) $ | $ \qquad \qquad g... | the inverse function mean that the f ( g ( x ) ) multiply g ( f ( x ) ) is equal x^2 , right ? |
this article includes a lot of function composition . if you need a review on this subject , we recommend that you go here before reading this article . inverse functions , in the most general sense , are functions that `` reverse '' each other . for example , if a function takes $ a $ to $ b $ , then the inverse must ... | let 's find $ f ( g ( x ) ) $ and $ g ( f ( x ) ) $ . $ f ( g ( x ) ) $ | $ \qquad \qquad g ( f ( x ) ) $ : - : | : - : $ \begin { align } f ( \greend { g ( x ) } ) & amp ; =\dfrac { \greend { g ( x ) } +1 } { 3 } \\ & amp ; =\dfrac { \greend { 3x-1 } +1 } { 3 } \\ & amp ; =\dfrac { 3x } { 3 } \\ & amp ; =x\\end { alig... | why , in problem # 3 , does n't the order of operations apply to the second line ? |
this article includes a lot of function composition . if you need a review on this subject , we recommend that you go here before reading this article . inverse functions , in the most general sense , are functions that `` reverse '' each other . for example , if a function takes $ a $ to $ b $ , then the inverse must ... | let 's take functions $ f $ and $ g $ for example : $ f ( x ) =\dfrac { x+1 } { 3 } $ and $ g ( x ) =3x-1 $ . notice how $ f ( 5 ) =2 $ and $ g ( 2 ) =5 $ . here we see that when we apply $ f $ followed by $ g $ , we get the original input back . | in other words , why does n't one first multiply `` x '' by `` 3/2 '' , and then `` 8 '' by `` 3/2 '' , and then multiply that by `` 2/3 '' ? |
a garden of gold and silver imagine a garden of miniature llamas , corn , flowers , and people all made of gold and silver . such a garden existed in the courtyard in one of the most important inka temples , the qorikancha , in the capital city of cuzco . one of these beautiful metal objects is a gold-silver alloy corn... | plants and animals represented in the golden garden can not grow and survive at every point in the empire , but only at specified altitudes . for example maize grows up to a mid-range altitude , and llamas graze at the highest points of the empire . the metallic maize cobs would have represented one of the most importa... | can anyone tell me why did the artist choose maize as the subject matter ? |
a garden of gold and silver imagine a garden of miniature llamas , corn , flowers , and people all made of gold and silver . such a garden existed in the courtyard in one of the most important inka temples , the qorikancha , in the capital city of cuzco . one of these beautiful metal objects is a gold-silver alloy corn... | a garden of gold and silver imagine a garden of miniature llamas , corn , flowers , and people all made of gold and silver . such a garden existed in the courtyard in one of the most important inka temples , the qorikancha , in the capital city of cuzco . | how were these cobs made ? |
a garden of gold and silver imagine a garden of miniature llamas , corn , flowers , and people all made of gold and silver . such a garden existed in the courtyard in one of the most important inka temples , the qorikancha , in the capital city of cuzco . one of these beautiful metal objects is a gold-silver alloy corn... | it mimics the appearance of a ripe ear of corn breaking through its husk , still on the stalk but ready to be harvested . in this sculptural representation of maize ( zea mays ) , individual kernels of corn protrude from the cob that is nestled in jagged metallic leaves . inka metalsmiths expertly combined silver and c... | can you provide me with the link to the the corn cob on the berlin museum 's website ? |
key points : there are many different kinds of viruses that infect humans and other animals , some causing serious illness and others not . viruses can be classified according to the baltimore system , and human-infecting viruses fall into all of its seven categories . the human immunodeficiency virus ( hiv ) , which c... | a retrovirus genome is single-stranded rna and comes in two copies per viral particle . the rna must be converted into double-stranded dna by an enzyme called reverse transcriptase , reversing the normal flow of information from dna to rna to protein in cells . the double-stranded dna enters the nucleus of the host cel... | where does a virus gets it rna or dna from in the first place ? |
key points : there are many different kinds of viruses that infect humans and other animals , some causing serious illness and others not . viruses can be classified according to the baltimore system , and human-infecting viruses fall into all of its seven categories . the human immunodeficiency virus ( hiv ) , which c... | a retrovirus genome is single-stranded rna and comes in two copies per viral particle . the rna must be converted into double-stranded dna by an enzyme called reverse transcriptase , reversing the normal flow of information from dna to rna to protein in cells . the double-stranded dna enters the nucleus of the host cel... | what do dna and rna stand for ? |
key points : there are many different kinds of viruses that infect humans and other animals , some causing serious illness and others not . viruses can be classified according to the baltimore system , and human-infecting viruses fall into all of its seven categories . the human immunodeficiency virus ( hiv ) , which c... | key points : there are many different kinds of viruses that infect humans and other animals , some causing serious illness and others not . viruses can be classified according to the baltimore system , and human-infecting viruses fall into all of its seven categories . | what the difference between eukaryocytes and prokaryocytes ? |
key points : there are many different kinds of viruses that infect humans and other animals , some causing serious illness and others not . viruses can be classified according to the baltimore system , and human-infecting viruses fall into all of its seven categories . the human immunodeficiency virus ( hiv ) , which c... | once attached to a host cell , animal viruses may enter in a variety of ways : by endocytosis , where the membrane folds in ; by making channels in the host membrane ( through which dna or rna can be injected ) ; or , for enveloped viruses , by fusing with the membrane and releasing the capsid inside of the cell . afte... | how does the viral genetic code know what to do once inside a cell ? |
key points : there are many different kinds of viruses that infect humans and other animals , some causing serious illness and others not . viruses can be classified according to the baltimore system , and human-infecting viruses fall into all of its seven categories . the human immunodeficiency virus ( hiv ) , which c... | the double-stranded dna enters the nucleus of the host cell and is inserted into the host genome by an enzyme called integrase . mrna can then be made by transcription of the viral dna , which , as a permanent part of the host cell 's genome , is called a provirus . the mrna is read to produce viral proteins and may al... | just to clarify : a prophage then falls under provirus ( in terms of categorizing these terms in my brain ) ? |
key points : there are many different kinds of viruses that infect humans and other animals , some causing serious illness and others not . viruses can be classified according to the baltimore system , and human-infecting viruses fall into all of its seven categories . the human immunodeficiency virus ( hiv ) , which c... | a retrovirus genome is single-stranded rna and comes in two copies per viral particle . the rna must be converted into double-stranded dna by an enzyme called reverse transcriptase , reversing the normal flow of information from dna to rna to protein in cells . the double-stranded dna enters the nucleus of the host cel... | where does viruses steal the dna or rna ? |
key points : there are many different kinds of viruses that infect humans and other animals , some causing serious illness and others not . viruses can be classified according to the baltimore system , and human-infecting viruses fall into all of its seven categories . the human immunodeficiency virus ( hiv ) , which c... | animal viruses , like other viruses , depend on host cells to complete their life cycle . in order to reproduce , a virus must infect a host cell and reprogram it to make more virus particles . the first key step in infection is recognition : an animal virus has special surface molecules that let it bind to receptors o... | herpes virus synthesizes its lipoprotein envelope with its host nuclear membrane 's aid but why does it not incorporate itself within the host cell plasma membrane , once eluding from the cell ? |
key points : there are many different kinds of viruses that infect humans and other animals , some causing serious illness and others not . viruses can be classified according to the baltimore system , and human-infecting viruses fall into all of its seven categories . the human immunodeficiency virus ( hiv ) , which c... | they have a protein shell , or capsid , and genetic material made of dna or rna that 's tucked inside the caspid . they may also feature an envelope , a sphere of membrane made of lipid . animal virus capsids come in many shapes . | so what is it that drives the synthesis of a lipoprotein envelope ? |
key points : there are many different kinds of viruses that infect humans and other animals , some causing serious illness and others not . viruses can be classified according to the baltimore system , and human-infecting viruses fall into all of its seven categories . the human immunodeficiency virus ( hiv ) , which c... | animal viruses , like other viruses , depend on host cells to complete their life cycle . in order to reproduce , a virus must infect a host cell and reprogram it to make more virus particles . the first key step in infection is recognition : an animal virus has special surface molecules that let it bind to receptors o... | is it correlated to the polarity of the outermost covering of a virus ? |
key points : there are many different kinds of viruses that infect humans and other animals , some causing serious illness and others not . viruses can be classified according to the baltimore system , and human-infecting viruses fall into all of its seven categories . the human immunodeficiency virus ( hiv ) , which c... | these drugs include : fusion inhibitors , which block fusion of the hiv viral envelope with the plasma membrane of the host cell reverse transcriptase inhibitors , which impair the conversion of the rna genome into double-stranded dna integrase inhibitors , which inhibit the integration of the viral dna into the host g... | or in case of glycoproteins something even more fascinating ? |
key points : there are many different kinds of viruses that infect humans and other animals , some causing serious illness and others not . viruses can be classified according to the baltimore system , and human-infecting viruses fall into all of its seven categories . the human immunodeficiency virus ( hiv ) , which c... | what does an animal virus look like ? like other viruses , animal viruses are tiny packages of protein and nucleic acid . they have a protein shell , or capsid , and genetic material made of dna or rna that 's tucked inside the caspid . they may also feature an envelope , a sphere of membrane made of lipid . | how does a tegumental protein show active and dormant phases ? |
key points : there are many different kinds of viruses that infect humans and other animals , some causing serious illness and others not . viruses can be classified according to the baltimore system , and human-infecting viruses fall into all of its seven categories . the human immunodeficiency virus ( hiv ) , which c... | you can see the basic features of each group , including its genetic material and the pathway it uses to make an mrna , in the diagram below : human viruses are found in all seven baltimore groups , while plant and bacterial viruses are found only in a subset of groups. $ ^1 $ if we want to develop a drug to target a v... | does a retrovirus go through both the lysogenic and lytic cycle ? |
key points : there are many different kinds of viruses that infect humans and other animals , some causing serious illness and others not . viruses can be classified according to the baltimore system , and human-infecting viruses fall into all of its seven categories . the human immunodeficiency virus ( hiv ) , which c... | animal viruses , like other viruses , depend on host cells to complete their life cycle . in order to reproduce , a virus must infect a host cell and reprogram it to make more virus particles . the first key step in infection is recognition : an animal virus has special surface molecules that let it bind to receptors o... | where in the cell does an ebola virus replicate its genome ? |
key points : there are many different kinds of viruses that infect humans and other animals , some causing serious illness and others not . viruses can be classified according to the baltimore system , and human-infecting viruses fall into all of its seven categories . the human immunodeficiency virus ( hiv ) , which c... | a more `` standard-looking '' virus , chikungunya , is shown below for comparison : chikungunya looks like a sphere , but is actually a $ 20 $ -sided icosahedron . animal virus genomes consist of either rna or dna , which may be single-stranded or double-stranded . animal viruses may use a range of strategies ( includi... | since dna molecule is a double-helix , and rna molecule is a single-stranded helix , why are there `` single-stranded dna '' in group ii and `` double-stranded rna '' in group iii according to the baltimore system ? |
key points : there are many different kinds of viruses that infect humans and other animals , some causing serious illness and others not . viruses can be classified according to the baltimore system , and human-infecting viruses fall into all of its seven categories . the human immunodeficiency virus ( hiv ) , which c... | animal viruses , like other viruses , depend on host cells to complete their life cycle . in order to reproduce , a virus must infect a host cell and reprogram it to make more virus particles . the first key step in infection is recognition : an animal virus has special surface molecules that let it bind to receptors o... | how does a virus infect a macrophage ? |
key points : there are many different kinds of viruses that infect humans and other animals , some causing serious illness and others not . viruses can be classified according to the baltimore system , and human-infecting viruses fall into all of its seven categories . the human immunodeficiency virus ( hiv ) , which c... | you can learn why this is the case in the virus evolution article . for more on symptoms , treatment , and prevention of hiv and aids , please see the health & amp ; medicine section on hiv and aids . | why do people get affected by hiv aids ? |
multi-colored dots swirl throughout the picture plane . smudges , blurs , irregularities—all are intentional . the artist , sigmar polke , delights in imperfections . stand too close to the canvas and you are immersed within the erratic whirl of dots . take a step back , and the imagery coheres into the loosest arrange... | smudges , blurs , irregularities—all are intentional . the artist , sigmar polke , delights in imperfections . stand too close to the canvas and you are immersed within the erratic whirl of dots . | seemingly opposite bodies of thought ... was there a third body of thought the artist did embrace ? |
introduction when a cell divides , one of its main jobs is to make sure that each of the two new cells gets a full , perfect copy of genetic material . mistakes during copying , or unequal division of the genetic material between cells , can lead to cells that are unhealthy or dysfunctional ( and may lead to diseases s... | in eukaryotes such as plants and animals , the majority of dna is found in the nucleus and is called nuclear dna . mitochondria , organelles that harvest energy for the cell , contain their own mitochondrial dna , and chloroplasts , organelles that carry out photosynthesis in plant cells , also have chloroplast dna . t... | dna is copied and split , but would n't that mean the other organelles in the cell have to copy too ? |
introduction when a cell divides , one of its main jobs is to make sure that each of the two new cells gets a full , perfect copy of genetic material . mistakes during copying , or unequal division of the genetic material between cells , can lead to cells that are unhealthy or dysfunctional ( and may lead to diseases s... | on the other hand , you may have two different gene versions on your two homologous chromosomes , such as one for type a and one for type b ( giving ab blood ) . the sex chromosomes , x and y , determine a person 's biological sex : xx specifies female and xy specifies male . these chromosomes are not true homologues a... | sperms have 1 sex determining chromosome x or y or it has 2 both x and y ? |
introduction when a cell divides , one of its main jobs is to make sure that each of the two new cells gets a full , perfect copy of genetic material . mistakes during copying , or unequal division of the genetic material between cells , can lead to cells that are unhealthy or dysfunctional ( and may lead to diseases s... | but what exactly is this genetic material , and how does it behave over the course of a cell division ? dna and genomes dna ( deoxyribonucleic acid ) is the genetic material of living organisms . in humans , dna is found in almost all the cells of the body and provides the instructions they need to grow , function , an... | how does dna get to the cells in the body ? |
introduction when a cell divides , one of its main jobs is to make sure that each of the two new cells gets a full , perfect copy of genetic material . mistakes during copying , or unequal division of the genetic material between cells , can lead to cells that are unhealthy or dysfunctional ( and may lead to diseases s... | instead , it ’ s broken up into separate , linear pieces called chromosomes . bacteria also have chromosomes , but their chromosomes are typically circular . chromosomes each species has its own characteristic number of chromosomes . humans , for instance , have 46 chromosomes in a typical body cell ( somatic cell ) , ... | why do dogs have so many chromosomes ? |
introduction when a cell divides , one of its main jobs is to make sure that each of the two new cells gets a full , perfect copy of genetic material . mistakes during copying , or unequal division of the genetic material between cells , can lead to cells that are unhealthy or dysfunctional ( and may lead to diseases s... | instead , it ’ s broken up into separate , linear pieces called chromosomes . bacteria also have chromosomes , but their chromosomes are typically circular . chromosomes each species has its own characteristic number of chromosomes . humans , for instance , have 46 chromosomes in a typical body cell ( somatic cell ) , ... | how many dna are there in a chromosomes ? |
introduction when a cell divides , one of its main jobs is to make sure that each of the two new cells gets a full , perfect copy of genetic material . mistakes during copying , or unequal division of the genetic material between cells , can lead to cells that are unhealthy or dysfunctional ( and may lead to diseases s... | physically speaking , dna is a long string of paired chemical units ( nucleotides ) that come in four different types , abbreviated a , t , c , and g , and it carries information organized into units called genes . genes typically provide instructions for making proteins , which give cells and organisms their functiona... | there are some cells without dna ? |
introduction when a cell divides , one of its main jobs is to make sure that each of the two new cells gets a full , perfect copy of genetic material . mistakes during copying , or unequal division of the genetic material between cells , can lead to cells that are unhealthy or dysfunctional ( and may lead to diseases s... | instead , it ’ s broken up into separate , linear pieces called chromosomes . bacteria also have chromosomes , but their chromosomes are typically circular . chromosomes each species has its own characteristic number of chromosomes . humans , for instance , have 46 chromosomes in a typical body cell ( somatic cell ) , ... | after replication in , say for example metaphase , there are how many chromosomes ? |
introduction when a cell divides , one of its main jobs is to make sure that each of the two new cells gets a full , perfect copy of genetic material . mistakes during copying , or unequal division of the genetic material between cells , can lead to cells that are unhealthy or dysfunctional ( and may lead to diseases s... | these chromosomes are not true homologues and are an exception to the rule of the same genes in the same places . aside from small regions of similarity needed during meiosis , or sex cell production , the x and y chromosomes are different and carry different genes . the 44 non-sex chromosomes in humans are called auto... | what does it mean by ''aside from small regions of similarity needed during meiosis , or sex cell production , the x and y chromosomes are different and carry different genes '' ? |
introduction when a cell divides , one of its main jobs is to make sure that each of the two new cells gets a full , perfect copy of genetic material . mistakes during copying , or unequal division of the genetic material between cells , can lead to cells that are unhealthy or dysfunctional ( and may lead to diseases s... | chromosomes and cell division as a cell prepares to divide , it must make a copy of each of its chromosomes . the two copies of a chromosome are called sister chromatids . the sister chromatids are identical to one another and are attached to each other by proteins called cohesins . the attachment between sister chroma... | are cohesins the joining protein of the sister chromatids ? |
introduction when a cell divides , one of its main jobs is to make sure that each of the two new cells gets a full , perfect copy of genetic material . mistakes during copying , or unequal division of the genetic material between cells , can lead to cells that are unhealthy or dysfunctional ( and may lead to diseases s... | instead , it ’ s broken up into separate , linear pieces called chromosomes . bacteria also have chromosomes , but their chromosomes are typically circular . chromosomes each species has its own characteristic number of chromosomes . humans , for instance , have 46 chromosomes in a typical body cell ( somatic cell ) , ... | what 's the relationship and differences between chromatids , centromeres and chromosomes ? |
introduction when a cell divides , one of its main jobs is to make sure that each of the two new cells gets a full , perfect copy of genetic material . mistakes during copying , or unequal division of the genetic material between cells , can lead to cells that are unhealthy or dysfunctional ( and may lead to diseases s... | in eukaryotes such as plants and animals , the majority of dna is found in the nucleus and is called nuclear dna . mitochondria , organelles that harvest energy for the cell , contain their own mitochondrial dna , and chloroplasts , organelles that carry out photosynthesis in plant cells , also have chloroplast dna . t... | what purpose does the dna in mitochondria and chloroplasts serve ? |
introduction when a cell divides , one of its main jobs is to make sure that each of the two new cells gets a full , perfect copy of genetic material . mistakes during copying , or unequal division of the genetic material between cells , can lead to cells that are unhealthy or dysfunctional ( and may lead to diseases s... | but what exactly is this genetic material , and how does it behave over the course of a cell division ? dna and genomes dna ( deoxyribonucleic acid ) is the genetic material of living organisms . in humans , dna is found in almost all the cells of the body and provides the instructions they need to grow , function , an... | what happens if dna is not present in human beings ? |
introduction when a cell divides , one of its main jobs is to make sure that each of the two new cells gets a full , perfect copy of genetic material . mistakes during copying , or unequal division of the genetic material between cells , can lead to cells that are unhealthy or dysfunctional ( and may lead to diseases s... | so , for each homologous pair of chromosomes in your genome , one of the homologues comes from your mom and the other from your dad . the two chromosomes in a homologous pair are very similar to one another and have the same size and shape . most importantly , they carry the same type of genetic information : that is ,... | how do chromosomes differ between one another ? |
introduction when a cell divides , one of its main jobs is to make sure that each of the two new cells gets a full , perfect copy of genetic material . mistakes during copying , or unequal division of the genetic material between cells , can lead to cells that are unhealthy or dysfunctional ( and may lead to diseases s... | instead , it ’ s broken up into separate , linear pieces called chromosomes . bacteria also have chromosomes , but their chromosomes are typically circular . chromosomes each species has its own characteristic number of chromosomes . humans , for instance , have 46 chromosomes in a typical body cell ( somatic cell ) , ... | why do we need 46 chromosomes ? |
introduction when a cell divides , one of its main jobs is to make sure that each of the two new cells gets a full , perfect copy of genetic material . mistakes during copying , or unequal division of the genetic material between cells , can lead to cells that are unhealthy or dysfunctional ( and may lead to diseases s... | but what exactly is this genetic material , and how does it behave over the course of a cell division ? dna and genomes dna ( deoxyribonucleic acid ) is the genetic material of living organisms . in humans , dna is found in almost all the cells of the body and provides the instructions they need to grow , function , an... | i would like to thank you for these helpful information.nevertheless , my question is does our gene exist in our dna inwhich dna combines with histone forming chromatids or what ? |
introduction when a cell divides , one of its main jobs is to make sure that each of the two new cells gets a full , perfect copy of genetic material . mistakes during copying , or unequal division of the genetic material between cells , can lead to cells that are unhealthy or dysfunctional ( and may lead to diseases s... | when chromatin condenses , you can se that eukaryotic dna is not just one long string . instead , it ’ s broken up into separate , linear pieces called chromosomes . bacteria also have chromosomes , but their chromosomes are typically circular . chromosomes each species has its own characteristic number of chromosomes ... | moreover , i ca n't understand how can 2 chromatid sisters forming 1 chromosomes separate forming 2 chromosomes ? |
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