questions stringlengths 37 1.22k | reasoning stringlengths 0 3.56k ⌀ | answers stringlengths 4 138 |
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The attractive force between water molecules is what kind of reaction?
Here are the choices:
A. diffusion reaction
B. symmetrical reaction
C. aquatic reaction
D. dipole reaction | The attractive force between water molecules is a dipole interaction. The hydrogen atoms are bound to the highly electronegative oxygen atom (which also possesses two lone pair sets of electrons, making for a very polar bond. The partially positive hydrogen atom of one molecule is then attracted to the oxygen atom of a... | D: dipole reaction. |
Which procedure helps modern nuclear physics convert lead into gold?
Here are the choices:
A. nuclear fission
B. evaporation
C. matter fusion
D. nuclear bombardment | The alchemists were never successful in changing lead into gold. But modern nuclear physics can accomplish this task. Lead is subjected to nuclear bombardment in a particle accelerator. A small amount of gold can be obtained by this process. However, the cost of the procedure is far more than the amount of gold obtaine... | D: nuclear bombardment. |
Alkanes are nonpolar and therefore do not attract what?
Here are the choices:
A. ions
B. atoms
C. molecules
D. eons | Alkanes are nonpolar; they do not attract ions. | A: ions. |
What do we call the lowest layer of the atmosphere?
Here are the choices:
A. asthenosphere
B. troposphere
C. mesosphere
D. stratosphere | The troposphere is the lowest layer of the atmosphere. In it, temperature decreases with altitude. The troposphere gets some of its heat directly from the Sun. Most, however, comes from Earth's surface. The surface is heated by the Sun and some of that heat radiates back into the air. This makes the temperature higher ... | B: troposphere. |
Oxygenated blood is transported by what system?
Here are the choices:
A. nervous
B. pulmonary
C. circulatory
D. skeletal | Oxygenated blood is transported by the circulatory system from lungs to tissues throughout the body. | C: circulatory. |
Internal resistance, or (electrical) resistance in general, involves the resistance of the flow of what?
Here are the choices:
A. force
B. current
C. protons
D. water | Internal Resistance As noted before, a 12-V truck battery is physically larger, contains more charge and energy, and can deliver a larger current than a 12-V motorcycle battery. Both are lead-acid batteries with identical emf, but, because of its size, the truck battery has a smaller internal resistance r . Internal re... | B: current. |
What gas produced by fossil fuel use is a major cause of global warming?
Here are the choices:
A. phosphorous
B. carbon dioxide
C. helium
D. hydrogen | When fossil fuels burn, they release thermal energy, water vapor, and carbon dioxide. Carbon dioxide produced by fossil fuel use is a major cause of global warming. The burning of fossil fuels also releases many pollutants into the air. Pollutants such as sulfur dioxide form acid rain, which kills living things and dam... | B: carbon dioxide. |
What supports most of earth's ecosystems?
Here are the choices:
A. moon
B. sun
C. crust
D. oceans | The Sun supports most of Earth's ecosystems. Plants create chemical energy from abiotic factors that include solar energy. The food energy created by producers is passed through the food chain. | B: sun. |
Because carbohydrates have a carbonyl functional group and several hydroxyl groups, they can undergo a variety of biochemically important reactions. the carbonyl group, for example, can be oxidized to form a carboxylic acid or reduced to form this?
Here are the choices:
A. glucose
B. caffeine
C. sucrose
D. alcohol | Because carbohydrates have a carbonyl functional group and several hydroxyl groups, they can undergo a variety of biochemically important reactions. The carbonyl group, for example, can be oxidized to form a carboxylic acid or reduced to form an alcohol. The hydroxyl groups can undergo substitution reactions, resulting... | D: alcohol. |
What do earth and the other planets in the solar system make around the sun?
Here are the choices:
A. radial orbits
B. elliptical orbits
C. smooth orbits
D. elevated orbits | Earth and the other planets in the solar system make elliptical orbits around the Sun. The ellipses in this image are highly exaggerated. | B: elliptical orbits. |
What do anglerfish use their glow-in-the-dark, rod-like structure for?
Here are the choices:
A. to attract prey
B. for protection
C. to find a mate
D. to keep warm | Anglerfish. This anglerfish lives between 1000 and 4000 meters below sea level. No sunlight penetrates to this depth. The rod-like structure on its face has a glow-in-the-dark tip. It is covered with microorganisms that give off their own light. The fish wiggles the structure like a worm to attract prey. In the darknes... | A: to attract prey. |
Surface tension is responsible for the fact that small insects can do this on water?
Here are the choices:
A. float
B. walk
C. swim
D. sink | tension causes liquids to form spheres in free fall or zero gravity (see - ball-ch10_s02_f01: the “floating” water isn’t in the shape of a sphere by accident; it is the result of surface tension). Surface tension is also responsible for the fact that small insects can “walk” on water. Because of surface tension, it tak... | B: walk. |
What kind of muscle is responsible for making the human heart beat?
Here are the choices:
A. teres minor
B. cardiac muscle
C. respiratory muscle
D. deltoid | Muscle tissue consists of cells that can contract, or shorten. Examples include skeletal muscle, which is attached to bones and makes them move. Other types of muscle include cardiac muscle, which makes the heart beat, and smooth muscle, which is found in other internal organs. | B: cardiac muscle. |
Channel proteins and carrier proteins help substances diffuse across what?
Here are the choices:
A. endoplasmic reticulum
B. cell membrane
C. ribosomes
D. cytoplasm | Facilitated Diffusion Across a Cell Membrane. Channel proteins and carrier proteins help substances diffuse across a cell membrane. In this diagram, the channel and carrier proteins are helping substances move into the cell (from the extracellular space to the intracellular space). | B: cell membrane. |
Humans building communities to make survival easier is an example of humans as a species changing their what?
Here are the choices:
A. environment
B. evolution
C. climate
D. instinctive behavior | A: environment. | |
When a lower energy level is ______ electrons are added to the next higher energy level.
Here are the choices:
A. ready
B. full
C. empty
D. unbalanced | Only when a lower energy level is full are electrons added to the next higher energy level. Electrons at higher energy levels, which are farther from the nucleus, have more energy. They also have more orbitals and greater possible numbers of electrons. | B: full. |
The amount of force applied per given area is called?
Here are the choices:
A. power
B. pressure
C. strength
D. energy | Bernoulli’s law states that the pressure of a moving fluid such as air is less when the fluid is moving faster. Pressure is the amount of force applied per given area. The law is named for Daniel Bernoulli, a Swiss mathematician who discovered it during the 1700s. Bernoulli used mathematics to arrive at his law. For an... | B: pressure. |
What is the atomic number of magnesium?
Here are the choices:
A. 17
B. 8
C. 12
D. 25 | REVIEW QUESTIONS 2. Magnesium has an atomic number of 12. Which of the following statements is true of a neutral magnesium atom? a. | C: 12. |
After the egg is fertilized the mrna is translated into what?
Here are the choices:
A. factor
B. DNA
C. protein
D. mitochondria | C: protein. | |
What is the process that ventilates lungs called?
Here are the choices:
A. reproduction
B. perspiration
C. breathing
D. photosynthesis | C: breathing. | |
What aspect of beryllium allows it to absorb x-rays?
Here are the choices:
A. high atomic number
B. low atomic number
C. relative atomic number
D. magnetism | TiCl4(l) + 2Mg(s) → Ti(s) + 2MgCl2(s) The only other alkaline earth that is widely used as the metal is beryllium, which is extremely toxic. Ingestion of beryllium or exposure to beryllium-containing dust causes a syndrome called berylliosis, characterized by severe inflammation of the respiratory tract or other tissue... | B: low atomic number. |
What are drilled to monitor groundwater pollution?
Here are the choices:
A. sewers
B. draining wells
C. test wells
D. aquifers | Test wells are drilled to monitor groundwater pollution. | C: test wells. |
The two smallest carboxylic acids are formic acid and what else?
Here are the choices:
A. ethylene acid
B. ascorbic acid
C. acetic acid
D. carbonates acid | The two smallest carboxylic acids are formic acid (found in the stingers of ants) and acetic acid (found in vinegar). Many organic compounds are considerably more complex than the examples described here. Many compounds, such as cholesterol discussed in the chapter-opening essay, contain more than one functional group.... | C: acetic acid. |
What incredibly successful species has quickly colonized almost all of earth’s terrestrial habitats, but also impacted earth, its climate, and its environment?
Here are the choices:
A. birds
B. chimpanzees
C. fish
D. humans | The human species has been incredibly successful. In a relatively short period of time, it has colonized almost all of Earth’s terrestrial habitats. Unfortunately, human beings have also impacted Earth, its climate, and its environment. Human actions threaten Earth’s valuable biodiversity. | D: humans. |
What prepares the body for fight or flight during emergencies?
Here are the choices:
A. abnormal division
B. adrenal mechanism
C. sympathetic division
D. metabolic response | The sympathetic division controls internal organs and glands during emergencies. It prepares the body for fight or flight ( Figure below ). For example, it increases the heart rate and the flow of blood to the legs, so you can run away from danger. | C: sympathetic division. |
Gymnosperms have evolved to include what?
Here are the choices:
A. stems
B. cells
C. flowers
D. seeds | Gymnosperms evolved to have seeds but do not have flowers. Examples of gymnosperms include the Redwood, Fir, and Cypress trees. Gymnos means "naked" in Greek; the seeds of gymnosperms are naked, not protected by flowers. | D: seeds. |
How do gametophyte plants form haploid gametes?
Here are the choices:
A. through mitosis
B. during after omniosis
C. during omniosis
D. during after mitosis | Plants in the haploid generation are called gametophytes . They form from haploid spores. They have male and/or female reproductive organs and reproduce sexually. They produce haploid gametes by mitosis. Fertilization of gametes produces diploid zygotes. Zygotes develop into the diploid generation. | A: through mitosis. |
What french chemist discovered the radioactive elements polonium and radium?
Here are the choices:
A. louis pasteur
B. margaret curie
C. marie curie
D. pascal curie | Another scientist, who worked with Becquerel, actually came up with the term radioactivity . The other scientist was the French chemist Marie Curie. She went on to discover the radioactive elements polonium and radium. She won two Nobel Prizes for her discoveries. You can learn more about Marie Curie at this URL: http:... | C: marie curie. |
What is another term for the parabolic motion of a thrown object?
Here are the choices:
A. projectile motion
B. regular motion
C. simple motion
D. newtonian motion | In this chapter, we aim to understand and explain the parabolic motion of a thrown object, known as projectile motion. Motion in one direction is unrelated to motion in other perpendicular directions. Once the object has been thrown, the only acceleration is in the (up/down) direction. The (right/left) direction veloci... | A: projectile motion. |
Passive immunity arises from the transfer of what to an individual, without requiring them to mount their own active immune response?
Here are the choices:
A. viruses
B. antibodies
C. parasites
D. bacteria | Passive immunity arises from the transfer of antibodies to an individual without requiring them to mount their own active immune response. Naturally acquired passive immunity is seen during fetal development. IgG is transferred from the maternal circulation to the fetus via the placenta, protecting the fetus from infec... | B: antibodies. |
At equilibrium reactants and what are equally abundant?
Here are the choices:
A. results
B. minerals
C. proactives
D. products | Reactants and products are equally abundant at equilibrium. | D: products. |
Mitochondria are thought to have evolved from what kind of cells?
Here are the choices:
A. ancient matrix
B. ancient prokaryotic
C. ancient phosphorylation
D. ancient ribosome | Mitochondria are thought to have evolved from ancient prokaryotic cells. | B: ancient prokaryotic. |
An acellular, external cuticle protects the _________.
Here are the choices:
A. lungs
B. dermis
C. stomach
D. epidermis | Anatomy The epidermis is protected by an acellular, external cuticle, but this is much thinner than the cuticle found in the ecdysozoans and does not require periodic shedding for growth. Circular as well as longitudinal muscles are located interior to the epidermis. Chitinous hairlike extensions, anchored in the epide... | D: epidermis. |
The average number of individuals per unit of area or volume is referred to as a population's what?
Here are the choices:
A. output
B. density
C. diameter
D. increase | Population density is the average number of individuals per unit of area or volume. | B: density. |
What is the medical term for a condition caused by abnormalities, such as mutations, in your genes or chromosomes?
Here are the choices:
A. radiation disorder
B. mutations disorder
C. nervous disorder
D. genetic disorder | Mutations , changes in the DNA or RNA sequence, can have significant phenotypic effects or they can have no effects. What are possible outcomes of some of those mutations. Some can produce genetic disorder . A genetic disorder is a condition caused by abnormalities, such as mutations, in your genes or chromosomes. Gene... | D: genetic disorder. |
What is glucose used for the bacteria?
Here are the choices:
A. reproduction
B. fuel
C. energy
D. food | Photosynthetic bacteria use the energy of the sun to make their own food. In the presence of sunlight, carbon dioxide and water are turned into glucose and oxygen. The glucose is then turned into usable energy. Glucose is like the "food" for the bacteria. An example of photosynthetic bacteria is cyanobacteria, as seen ... | D: food. |
What do carnivores eat?
Here are the choices:
A. plants
B. ice
C. animals
D. algae | Carnivores consume animals. Examples include lions, polar bears, hawks, frogs, salmon, and spiders. Carnivores that are unable to digest plants and must eat only animals are called obligate carnivores. Other carnivores can digest plants but do not commonly eat them. | C: animals. |
What is algae easier to covert into that corn is currently used for?
Here are the choices:
A. sugar
B. food
C. fuel
D. oil | Research is being done into alternative crops for biofuels. A very promising alternative is algae. Algae appears to be a better biofuel than corn. Algae is much easier to convert to a usable fuel. Growing algae requires much less land and energy than crops. Algae can be grown in locations that are not used for other th... | C: fuel. |
Dividing net force by total mass yields what?
Here are the choices:
A. transmission
B. energy
C. movement
D. acceleration | Solution: The force acting to move the system is the weight of box B, and the force resisting the movement is the force of friction between the table and box A. The mass of the system is the sum of the masses of both boxes. The acceleration of the system can be found by dividing the net force by the total mass. | D: acceleration. |
What ensures that seeds germinate only when conditions for seedling survival are optimal?
Here are the choices:
A. seed dormancy
B. germination dormancy
C. survival dormancy
D. seed forcing | A: seed dormancy. | |
The a in atp is short for what?
Here are the choices:
A. amino
B. acid
C. adenosine
D. acetic | Let’s take a closer look at a molecule of ATP. Although it carries less energy than glucose, its structure is more complex. “A” in ATP refers to the majority of the molecule – adenosine – a combination of a nitrogenous base and a five-carbon sugar. “T” and “P” indicate the three phosphates, linked by bonds which hold t... | C: adenosine. |
How many fingers do apes have on each hand?
Here are the choices:
A. seven
B. five
C. four
D. six | Humans and apes have five fingers they can use to grasp objects. Do you think these are analogous or homologous structures? Explain. | B: five. |
Which atomic particle has a positive charge?
Here are the choices:
A. the proton
B. the nucleus
C. the electron
D. the neutron | A proton is one of three main particles that make up the atom. The other two particles are the neutron and electron. Protons are found in the nucleus of the atom. This is a tiny, dense region at the center of the atom. Protons have a positive electrical charge of one (+1) and a mass of 1 atomic mass unit (amu), which i... | A: the proton. |
What does the presence of gill slits suggest about humans and fish?
Here are the choices:
A. common ancestor
B. Common Cells
C. Shared History
D. Same evolutionary chain | Some unexpected traits can appear in animal embryos. For example, human embryos have gill slits just like fish! In fish they develop into gills, but in humans they disappear before birth. The presence of the gill slits suggests that a long time ago humans and fish shared a common ancestor. | A: common ancestor. |
What was first discovered in songbirds that produce new neurons while learning songs?
Here are the choices:
A. homeostasis
B. neurogenesis
C. Brain Cord
D. proteins | Neurogenesis At one time, scientists believed that people were born with all the neurons they would ever have. Research performed during the last few decades indicates that neurogenesis, the birth of new neurons, continues into adulthood. Neurogenesis was first discovered in songbirds that produce new neurons while lea... | B: neurogenesis. |
Whether focused on ancient life, the life of bacteria, or how humans could live on the moon, four unifying principles form the basis of what branch of science?
Here are the choices:
A. biology
B. chemistry
C. electronics
D. geology | Four unifying principles form the basis of biology. Whether biologists are interested in ancient life, the life of bacteria, or how humans could live on the moon, they base their overall understanding of biology on these four principles:. | A: biology. |
What do we call the center of a hurricane where the air is calm and clear?
Here are the choices:
A. neck
B. eye
C. nose
D. epicenter | At the center of a hurricane is a small area where the air is calm and clear. This is the eye of the hurricane. The eye forms at the low-pressure center of the hurricane. You can see the eye of a hurricane in Figure below . | B: eye. |
Mass can be destroyed to release what?
Here are the choices:
A. velocity
B. acceleration
C. mass
D. energy | Mass can be destroyed to release energy. • We do not ordinarily notice the increase or decrease in mass of an object because the change in mass is so small for a large increase in energy. • The relativistic work-energy theorem is W net = E − E 0 = γmc 2 − mc 2 = ⎛⎝γ − 1⎞⎠mc 2 . • Relativistically,. | D: energy. |
Name the organ located behind the nasal cavity in which both food and air pass through?
Here are the choices:
A. diaphragm
B. medulla
C. pharynx
D. sinus | Behind the nasal cavity, air passes through the pharynx , a long tube. Both food and air pass through the pharynx. | C: pharynx. |
Both mitosis and meiosis result in eukaryotic cells doing what?
Here are the choices:
A. dividing
B. friction
C. multiplication
D. limiting | Both mitosis and meiosis result in eukaryotic cells dividing. So what is the difference between mitosis and meiosis? The primary difference is the differing goals of each process. The goal of mitosis is to produce two daughter cells that are genetically identical to the parent cell, meaning the new cells have exactly t... | A: dividing. |
In resting neurons, the plasma membrane has many open potassium channels but few open of which other channels?
Here are the choices:
A. sulfur
B. sodium
C. oxygen
D. silicon | B: sodium. | |
The theory of evolution by what (and other processes) explains both the diversity of organisms and how populations of organisms change over time?
Here are the choices:
A. characteristic selection
B. genocide
C. natural selection
D. natural evolution | Biology has only a few over arching theories. One of these, the Cell Theory of Life, explains the historic continuity of organisms, while the Theory of Evolution by Natural Selection (and other processes), explains both the diversity of organisms and how populations of organisms change over time. Finally, the Physicoch... | C: natural selection. |
What is formed when a monomer of glucose and a monomer of fructose are joined in a dehydration reaction to form a glycosidic bond?
Here are the choices:
A. fructose
B. sulfate
C. sucrose
D. chloride | Figure 3.7 Sucrose is formed when a monomer of glucose and a monomer of fructose are joined in a dehydration reaction to form a glycosidic bond. In the process, a water molecule is lost. By convention, the carbon atoms in a monosaccharide are numbered from the terminal carbon closest to the carbonyl group. In sucrose, ... | C: sucrose. |
What is the spread of cancer cells beyond their original site called?
Here are the choices:
A. apoptosis
B. scattering
C. mutations
D. metastasis | D: metastasis. | |
What is another name for flatworms such as tapeworms and flukes?
Here are the choices:
A. trematodes
B. platyhelminthes
C. polychaetes
D. epiphytes | Platyhelminthes are flatworms such as tapeworms and flukes. | B: platyhelminthes. |
The lithosphere-asthensophere divisions are based on what?
Here are the choices:
A. mechanical properties
B. mechanical compounds
C. elemental properties
D. constant properties | The lithosphere-asthensophere divisions are based on mechanical properties. | A: mechanical properties. |
The second shell holds a maximum of how many electrons?
Here are the choices:
A. 8
B. 9
C. 12
D. 6 | A: 8. | |
Olfaction refers to which of the five senses?
Here are the choices:
A. smell
B. touch
C. sight
D. taste | Olfaction is not the pre-eminent sense, but its loss can be quite detrimental. The enjoyment of food is largely based on our sense of smell. Anosmia means that food will not seem to have the same taste, though the gustatory sense is intact, and food will often be described as being bland. However, the taste of food can... | A: smell. |
What devices convert mechanical energy to electric energy?
Here are the choices:
A. mechanical generators
B. transformation generators
C. electric generators
D. kinetic generators | Electric generators convert mechanical energy to electric energy. | C: electric generators. |
When oxygen is not bound to heme and the partial pressure of oxygen is low, hemoglobin readily binds to what?
Here are the choices:
A. carbon
B. carbon dioxide
C. sulfur
D. iron | to within the alveoli. As a result, carbon dioxide dissociates readily from hemoglobin and diffuses across the respiratory membrane into the air. In addition to the partial pressure of carbon dioxide, the oxygen saturation of hemoglobin and the partial pressure of oxygen in the blood also influence the affinity of hemo... | B: carbon dioxide. |
What is group 16 of the periodic table referred to?
Here are the choices:
A. dioxide group
B. acid group
C. oxygen group
D. sulfur group | Group 16 of the periodic table is also called the oxygen group. The first three elements—oxygen (O), sulfur (S), and selenium (Se)—are nonmetals. They are followed by tellurium (Te) ( Figure below ), a metalloid, and polonium (Po), a metal. All group 16 elements have six valence electrons and are very reactive. Oxygen ... | C: oxygen group. |
Restoring nitrogen to the soil is one reason for what agricultural practice?
Here are the choices:
A. sowing
B. crop rotation
C. plowing
D. irrigation | B: crop rotation. | |
What is the term for evolution over geologic time above the level of the species?
Here are the choices:
A. speciation
B. mutation
C. microevolution
D. macroevolution | Macroevolution is evolution over geologic time above the level of the species. One of the main topics in macroevolution is how new species arise. The process by which a new species evolves is called speciation . How does speciation occur? How does one species evolve into two or more new species?. | D: macroevolution. |
Is the heat of reaction positive or negative for an endothermic reaction?
Here are the choices:
A. Negative
B. positive
C. Neither
D. Both | Because the heat is absorbed by the system, the 177.8 kJ is written as a reactant. The heat of reaction is positive for an endothermic reaction. | B: positive. |
The superior nasal concha and middle nasal concha are parts of which bone?
Here are the choices:
A. ethmoid bone
B. nostril bone
C. nasal bone
D. gastrulation bone | Figure 7.13 Lateral Wall of Nasal Cavity The three nasal conchae are curved bones that project from the lateral walls of the nasal cavity. The superior nasal concha and middle nasal concha are parts of the ethmoid bone. The inferior nasal concha is an independent bone of the skull. | A: ethmoid bone. |
The energy a chemical reaction needs to get started is called what kind of energy?
Here are the choices:
A. function
B. fusion
C. conduction
D. activation | All chemical reactions, even exothermic reactions, need a certain amount of energy to get started. This energy is called activation energy . For example, activation energy is needed to start a car. Turning the key causes a spark that activates the burning of gasoline in the engine. The combustion of gas won’t occur wit... | D: activation. |
Crossing charges is one method for obtaining what?
Here are the choices:
A. hybrids
B. superscripts
C. subscripts
D. notations | Crossing charges. One method for obtaining subscripts in the empirical formula is by crossing charges. When crossing charges, you will sometimes find it necessary to reduce the subscripts to their simplest ratio to write the empirical formula. Consider, for example, the compound formed by Mg2+ and O2−. Using the absolu... | C: subscripts. |
What do scientists collect to test a hypothesis?
Here are the choices:
A. evidence
B. beilefs
C. arguements
D. books | Scientists collect evidence to test a hypothesis. The evidence may refute the hypothesis. In that case, it will be thrown out. The evidence may support the hypothesis. The scientists will then gather more evidence. The scientists will accept the hypothesis if: (1) There is no significant evidence to refute the hypothes... | A: evidence. |
Fatal swelling of what organ can result from both encephalitis and meningitis, which typically cause a severe headache and a fever?
Here are the choices:
A. liver
B. brain
C. kidney
D. heart | Encephalitis and meningitis aren’t very common, but they can be extremely serious. They may cause swelling of the brain, which can be fatal. That’s why it’s important to know the symptoms of these diseases. Both encephalitis and meningitis typically cause a severe headache and a fever. Meningitis also causes a stiff ne... | B: brain. |
Gases can undergo diffusion, or the opposite, which is what?
Here are the choices:
A. dissipation
B. effusion
C. infusion
D. defusion | Define diffusion and effusion and how they relate to other properties of gases. | B: effusion. |
What science is the study of the occurrence, distribution, and determinants of health and disease in a population?
Here are the choices:
A. physiology
B. histology
C. epidemiology
D. toxicology | Epidemiologist Epidemiology is the study of the occurrence, distribution, and determinants of health and disease in a population. It is, therefore, related to public health. An epidemiologist studies the frequency and distribution of diseases within human populations and environments. Epidemiologists collect data about... | C: epidemiology. |
Amphibian larvae go through what process to change into the adult form?
Here are the choices:
A. merging
B. morphing
C. parthenogenesis
D. metamorphosis | Amphibian larvae go through metamorphosis to change into the adult form. | D: metamorphosis. |
Reducing the production of what gas, or removing it from the air, are practices that could reduce global warming?
Here are the choices:
A. carbon dioxide
B. oxygen
C. hydrogen
D. helium | Efforts to reduce future global warming mainly involve energy use. We need to use less energy, for example, by driving more fuel-efficient cars. We also need to switch to energy sources that produce less carbon dioxide, such as solar and wind energy. At the same time, we can increase the amount of carbon dioxide that i... | A: carbon dioxide. |
There are a series of rules for naming branched alkanes (and, ultimately, for all organic compounds). these rules make up the system of nomenclature for naming what?
Here are the choices:
A. organic molecules
B. typical molecules
C. non-organic molecules
D. oxygen molecules | Not all hydrocarbons are straight chains. Many hydrocarbons have branches of C atoms attached to a chain. These branched alkanes are isomers of straight-chain alkanes having the same number of C atoms. However, they are different compounds with different physical and chemical properties. As such, they need different na... | A: organic molecules. |
Which theory helps predict future events in weather?
Here are the choices:
A. future weather theory
B. climate change theory
C. carbon change theory
D. expected change theory | The theory of climate change is very new. In fact, scientists don't even call it a theory. But it meets the requirements. These are the things we know: (1) average global temperatures are rising, (2) greenhouse gases trap heat in the atmosphere, (3) CO 2 is released into the atmosphere when fossil fuels are burned, (4)... | B: climate change theory. |
What is defined as a group of living and nonliving things and their environment?
Here are the choices:
A. ecosystem
B. degradation
C. degradation
D. habitat | An ecosystem is a group of living things and their environment. It is made up of both living and nonliving things. | A: ecosystem. |
Cancer is caused by mutations, which can be caused by pathogens, chemicals, or what else?
Here are the choices:
A. evaporation
B. convection
C. radiation
D. diseases | Cancer is caused by mutations, which can be caused by pathogens, chemicals, or radiation. | C: radiation. |
What is the term for a mutually beneficial relationship in which one organism lives inside the other?
Here are the choices:
A. endosymbiosis
B. parasite
C. symbiosis
D. parthenogenesis | Endosymbiosis We have mentioned that both mitochondria and chloroplasts contain DNA and ribosomes. Have you wondered why? Strong evidence points to endosymbiosis as the explanation. Symbiosis is a relationship in which organisms from two separate species depend on each other for their survival. Endosymbiosis (endo- = “... | A: endosymbiosis. |
All new alleles are formed by what types of mutations?
Here are the choices:
A. chaotic
B. ordinary
C. systemic
D. random | D: random. | |
What are seeds plants that produce naked seeds in cones called?
Here are the choices:
A. lipids
B. angiosperms
C. cytoplasm
D. gymnosperms | Gymnosperms are seed plants that produce naked seeds in cones. There are about 1000 species of gymnosperms. Conifers are the most common group of gymnosperms. The spruce tree in Figure below is an example of a conifer. | D: gymnosperms. |
Water is the solvent in solutions called acids and?
Here are the choices:
A. bases
B. nutrients
C. proteins
D. alkalines | Water is the solvent in solutions called acids and bases. To understand acids and bases, it is important to know more about pure water, in which nothing is dissolved. In pure water (such as distilled water), a tiny fraction of water molecules naturally breaks down, or dissociates, to form ions. An ion is an electricall... | A: bases. |
What two gases are the main components of air?
Here are the choices:
A. carbon and oxygen
B. hydrogen and helium
C. oxygen and helium
D. nitrogen and oxygen | A: Other examples of liquid mixtures include salt water and salad dressing. Air is a mixture of gases, mainly nitrogen and oxygen. The rock pictured in the Figure below is a solid mixture. | D: nitrogen and oxygen. |
Anaerobic prokaryotes can live without what compound in their environment (it's a compound that people do need to live)?
Here are the choices:
A. carbon
B. Hydrogen
C. nitrogen
D. oxygen | Aerobic prokaryotes live in habitats with oxygen. Anaerobic prokaryotes live in habitats without oxygen. Prokaryotes may also be adapted to habitats that are hot, moderate, or cold in temperature. | D: oxygen. |
What part of earth do many animals use for navigation?
Here are the choices:
A. magnetic field
B. atmosphere
C. oceans
D. molten core | Another benefit of Earth’s magnetic field is its use for navigation. People use compasses to detect Earth’s magnetic north pole and tell direction. Many animals have natural “compasses” that work just as well. For example, the loggerhead turtle in the Figure below senses the direction and strength of Earth’s magnetic f... | A: magnetic field. |
Endocytosis and exocytosis are types of vesicle transport that carry very large molecules across what structure?
Here are the choices:
A. the heart
B. dermis
C. cell membrane
D. cell substrate | Illustration of the two types of vesicle transport, exocytosis and endocytosis. Endocytosis and exocytosis are types of vesicle transport that carry very large molecules across the cell membrane. | C: cell membrane. |
What are biochemical compounds that living things use to store energy and make cell membranes?
Here are the choices:
A. lipids
B. nucleic acid
C. carbohydrates
D. proteins | Lipids are biochemical compounds that living things use to store energy and make cell membranes. Types of lipids include fats, oils, and phospholipids. | A: lipids. |
What happens to the volume of a balloon when you add moles of gas to it by blowing up?
Here are the choices:
A. changes randomly
B. stays the same
C. increases
D. decreases | where is the number of moles of gas and is a constant. Avogadro’s law is in evidence whenever you blow up a balloon. The volume of the balloon increases as you add moles of gas to the balloon by blowing it up. | C: increases. |
The addition of starting materials and the removal of end products prevent metabolism from reaching what state?
Here are the choices:
A. inequality
B. equilibrium
C. constant
D. imbalance | B: equilibrium. | |
In what year was the hardy-weinberg theorem formulated?
Here are the choices:
A. 1901
B. 1928
C. 1938
D. 1908 | Evolution occurs in a population when allele frequencies change over time. What causes allele frequencies to change? That question was answered by Godfrey Hardy and Wilhelm Weinberg in 1908 (see the Hardy-Weinberg Theorem concept). | D: 1908. |
The regulation of gene expression is extremely important during the development of what?
Here are the choices:
A. organism
B. cells
C. protein
D. tissues | 3. Name and describe the division of gymnosperms. | A: organism. |
What does a virus inject into the host cell?
Here are the choices:
A. proteins acid
B. nucleic acid
C. cells acid
D. Acetic acid | 22.2.1 Lytic Cycle 1. Attachment: The virus binds to specific receptors on the host cell. Entry: There are two ways in which a virus can enter cells. Firstly, the virus can inject its nucleic acid into the host cell. Secondly, if a virus is contained in an envelope, the host cell can phagocytosise the entire virus part... | B: nucleic acid. |
Mutations in regulatory genes that normally control the cell cycle cause what?
Here are the choices:
A. cancer
B. illness
C. tumors
D. anxiety | Mutations in regulatory genes that normally control the cell cycle cause cancer. | A: cancer. |
Blood is made up of red blood cells, white blood cells, platelets, and what else?
Here are the choices:
A. hemoglobin
B. plasma
C. potassium
D. pathogens | Did you know that blood is a tissue? Blood is a fluid connective tissue that is made up of red blood cells, white blood cells, platelets, and plasma. The cells that make up blood are pictured below ( Figure below ). The different parts of blood have different roles. | B: plasma. |
What is the term for the study of how living things interact with each other and with their environment?
Here are the choices:
A. radiology
B. biology
C. ecology
D. anthropology | Ecology is the study of how living things interact with each other and with their environment. It is a major branch of biology, but has areas of overlap with geography, geology, climatology, and other sciences. This lesson introduces fundamental concepts in ecology, beginning with organisms and the environment. | C: ecology. |
What takes place directly after developing a hypothesis in the scientific method process?
Here are the choices:
A. gathering materials
B. independent variables
C. making a conclusion
D. testing the hypothesis | Scientific method is a process consisting of making observations, developing a hypothesis, and testing that hypothesis. | D: testing the hypothesis. |
What should you use to protect your eyes from chemicals?
Here are the choices:
A. contacts
B. eye goggles
C. certain goggles
D. your hands | B: eye goggles. | |
Because action potentials are so brief, a neuron can produce hundreds per what?
Here are the choices:
A. lifetime
B. minute
C. second
D. day | C: second. | |
Darwin coined what term to refer to an organism’s relative ability to survive and produce fertile offspring?
Here are the choices:
A. fitness
B. metabolism
C. strength
D. momentum | Darwin coined the term fitness to refer to an organism’s relative ability to survive and produce fertile offspring. Nature selects the variations that are most useful. Therefore, he called this type of selection natural selection. | A: fitness. |
At high pressures, how are the molecules of a gas crowded?
Here are the choices:
A. small together
B. closer together
C. few together
D. further apart | Particles of a hypothetical ideal gas have no significant volume and do not attract or repel each other. In general, real gases approximate this behavior at relatively low pressures and high temperatures. However, at high pressures, the molecules of a gas are crowded closer together, and the amount of empty space betwe... | B: closer together. |
The number of possible isomers increases tremendously as carbon skeletons increase in what?
Here are the choices:
A. weight
B. size
C. mass
D. variation | B: size. |
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