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What allows giraffes to reach leaves that other ground animals cannot? | long horns | camouflage pattern | long tongue | long necks | African Giraffes. Giraffes feed on leaves high in trees. Their long necks allow them to reach leaves that other ground animals cannot. |
Chemical formulas for ionic compounds are called what? | magnetic formulas | electronic formulas | velocity formulas | ionic formulas | Chemical formulas for ionic compounds are called ionic formulas. A proper ionic formula has a cation and an anion in it; an ionic compound is never formed between two cations only or two anions only. The key to writing proper ionic formulas is simple: the total positive charge must balance the total negative charge. Be... |
What term is used to describe the full range of electromagnetic waves? | mechanical spectrum | electromagnetic scale | electromagnetic series | electromagnetic spectrum | Electromagnetic waves vary in their wavelength, frequency, and energy. The full range of electromagnetic waves makes up the electromagnetic spectrum. |
How many lobes is each hemisphere of the cerebrum divided into? | 5 | 9 | 2 | 4 | Each hemisphere of the cerebrum is divided into four parts, called lobes. The four lobes are the:. |
Varicose veins are veins that become enlarged because the valves no longer do this? | enlarge properly | shrink properly | open properly | close properly | Blood travels through the bicuspid valve to the left atrium. Both the aortic and the pulmonary valves are semilunar valves. The mitral valve is an atrioventricular valve. Figure 40.17 Varicose veins are veins that become enlarged because the valves no longer close properly, allowing blood to flow backward. Varicose vei... |
Liquids with strong intermolecular forces have higher what than liquids with weaker forces? | freezing point | temperature | melting point | surface tension | Liquids with strong intermolecular forces have higher surface tensions than liquids with weaker forces. |
What kind of volcanoes often form along divergent plate boundaries? | crest | composite | dome | shield | Shield volcanoes often form along divergent plate boundaries. They also form at hotspots, like Hawaii. Shield volcano eruptions are non-explosive. |
An element symbol without a charge written next to it is assumed to be what? | surfactants atom | dead atom | corroborate atom | uncharged atom | Third, there are some exceptions to the previous point. A few elements, all metals, can form more than one possible charge. For example, iron atoms can form 2+ cations or 3+ cations. Cobalt is another element that can form more than one possible charged ion (2+ and 3+), while lead can form 2+ or 4+ cations. Unfortunate... |
What is the fundamental unit of structure and function in all living organisms? | the vessels | the spinal cord | the backbone | the cell | the cell is the fundamental unit of structure and function in all living organisms,. |
What characteristic of particles determines how they are carried by flowing water? | texture | density | color | size | The size of particles determines how they are carried by flowing water. This is illustrated in Figure below . |
What term refers to something supplied by nature that helps support life? | existing resource | free resource | simple resource | natural resource | A natural resource is something supplied by nature that helps support life. When you think of natural resources, you may think of fossil fuels, like the coal in the coal field pictured in Figure below . However, sunlight, wind, soil, and living things are also important natural resources. |
What is the shape of the orbits that planets make around the sun? | elongated | conical | variable | elliptical | The planets make slightly elliptical orbits around the Sun. |
What are chlamydia, gonorrhea, and syphilis an example of? | viral stis | metabolic disorders | genetic diseases | bacterial stis | A sexually transmitted infection (STI) is a disease that spreads mainly through sexual contact. STIs are more common in teens and young adults than in older people. Bacterial STIs include chlamydia, gonorrhea, and syphilis. Viral STIs include genital warts, genital herpes, and AIDS. |
What organism are resistant to freezing and drying and also are metabolically inactive? | trichina | giardia | spirogyra | zygosporangia | |
What is produced during a condensation reaction? | fire | rain | wind | water | Condensation reactions are the chemical processes by which large organic compounds are synthesized from their monomeric units. Hydrolysis reactions are the reverse process. During condensation reactions, water is produced from the two molecules being bonded together; an H from one monomer is joined to an -OH from anoth... |
What force pulls objects toward the center of the earth? | momentum | kinetic energy | centrifugal force | gravity | |
Where are protons and neutrons located? | orbitals | outside the nucleus | secondary nucleus | central nucleus | Protons and neutrons are located in a central nucleus, while electrons orbit about the nucleus. |
What is a measurement of the amount of variation of the species in a given area called? | degradation | ecosystem | population | biodiversity | Biodiversity is a measurement of the amount of variation of the species in a given area. More specifically, biodiversity can be defined as the variety of life and its processes, including the variety of living organisms, the genetic differences among them, and the communities and ecosystems in which they occur. |
Deleting or inserting a nitrogen base causes what? | a photoinhibition mutation | a placentation mutation | a degenerative mutation | a frameshift mutation | Deleting or inserting a nitrogen base causes a frameshift mutation. All of the codons following the mutation are misread. This may be disastrous. To see why, consider this English-language analogy. Take the sentence “The big dog ate the red cat. ” If the second letter of “big” is deleted, then the sentence becomes: “Th... |
What are the chemical messengers used to communicate between cells? | neurons | membranes | peptides | hormones | Hormones, chemical messengers used to communicate between cells, are important in regulating digestion. |
Graphite and diamond both are made from carbon. what makes diamonds so hard? | strong light network | weak atomic network | strong metallic network | strong atomic network | Sometimes two different minerals have the same chemical composition. But they are different minerals because they have different crystal structures. Diamonds are beautiful gemstones because they are very pretty and very hard. Graphite is the “lead” in pencils. It's not hard at all! Amazingly, both are made just of carb... |
The paranasal sinuses are hollow, air-filled spaces located within certain bones of the skull. all of the sinuses communicate with the nasal cavity (paranasal = “next to nasal cavity”) and are lined with this? | fluid mucosa | respiration mucosa | oral mucosa | nasal mucosa | Paranasal Sinuses The paranasal sinuses are hollow, air-filled spaces located within certain bones of the skull (Figure 7.18). All of the sinuses communicate with the nasal cavity (paranasal = “next to nasal cavity”) and are lined with nasal mucosa. They serve to reduce bone mass and thus lighten the skull, and they al... |
What determines the strength of a base when dissolved in water? | saline content | amount of phosphorus ions produced | pH level | amount of hydroxide ions produced | The strength of a base depends on how many hydroxide ions it produces when it dissolves in water. A stronger base produces more hydroxide ions than a weaker base. For example, sodium hydroxide (NaOH), a base in drain cleaner, is a strong base because all of it breaks down into ions when it dissolves in water. Calcium c... |
What is the low level of radiation that occurs naturally in the environment called? | consequence radiation | temperature radiation | neon radiation | background radiation | A low level of radiation occurs naturally in the environment. This is called background radiation. It comes from various sources. One source is rocks, which may contain small amounts of radioactive elements such as uranium. Another source is cosmic rays. These are charged particles that arrive on Earth from outer space... |
Varicella zoster virus causes what two illnesses? | syphilis and lyme | flu and shingles | german measles and flu | chicken pox and shingles | An enveloped virus. Varicella zoster virus causes chicken pox and shingles. |
The urethra transports urine from what organ to the outside of the body for disposal? | brain | heart | lungs | bladder | Urethra The urethra transports urine from the bladder to the outside of the body for disposal. The urethra is the only urologic organ that shows any significant anatomic difference between males and females; all other urine transport structures are identical (Figure 25.3). |
Magnetite crystals in lava typically point to what geographic location? | geographic north pole | the equator | magnetic south pole | magnetic north pole | Magnetite crystals in the lava point in the direction of the magnetic north pole. The different stripes of magnetic polarity reveal the different ages of the seafloor. |
Liquids that mix with water in all proportions are usually polar substances or substances that form these? | compressed bonds | silicon bonds | atmospheric bonds | hydrogen bonds | Liquids that mix with water in all proportions are usually polar substances or substances that form hydrogen bonds. For such liquids, the dipole-dipole attractions (or hydrogen bonding) of the solute molecules with the solvent molecules are at least as strong as those between molecules in the pure solute or in the pure... |
Lattice energy cannot be measured directly. what is its calculation based on? | microscopic inspection | chemical reactions | change in temperature | measured energy changes | There are a number of different ways to measure the strength of a given crystal lattice. One way would be to measure the amount of energy needed to completely pull apart an ionic substance into isolated ions. This value, known as the lattice energy , cannot be measured directly, but it can be calculated based on measur... |
What process provides over 99% of the energy supply for life on earth? | Carbon | gases | nutrients | photosynthesis | Photosynthesis provides over 99% of the energy supply for life on Earth. A much smaller group of autotrophs - mostly bacteria in dark or low-oxygen environments - produce food using the chemical energy stored in inorganic molecules such as hydrogen sulfide, ammonia, or methane. While photosynthesis transforms light ene... |
What type of animal are most reptiles in regards to diet? | arthropods | herbivores | omnivores | carnivores | Most reptiles are carnivores, and large reptiles are the top predators in their ecosystems. |
Because of their reactivity, we do not find most representative metals as free elements where? | underground | in water | in the atomospher | in nature | [PCl 3][Cl 2] (0.135)(0.135) = = 0.021 0.87 [PCl 5] The equilibrium constant calculated from the equilibrium concentrations is equal to the value of Kc given in the problem (when rounded to the proper number of significant figures). Thus, the calculated equilibrium concentrations check. Kc =. |
Two important concepts, niche and habitat, are associated with what? | water | natural selection | plant | ecosystem | Two important concepts associated with the ecosystem are niche and habitat. |
When does diseases like alzheimer's become more common? | i-40 age | toddler | teenager | old age | Old age begins in the mid-60s and lasts until the end of life. Most people over 65 have retired from work, freeing up their time for hobbies, grandchildren, and other interests. Stamina, strength, reflex time, and the senses all decline during old age, and the number of brain cells decreases as well. The immune system ... |
What is a fibrocartilaginous pad that fills the gap between adjacent vertebral bodies? | subsidence disc | unidirectional disc | Back Disk | intervertebral disc | Intervertebral Disc An intervertebral disc is a fibrocartilaginous pad that fills the gap between adjacent vertebral bodies (see Figure 7.24). Each disc is anchored to the bodies of its adjacent vertebrae, thus strongly uniting these. The discs also provide padding between vertebrae during weight bearing. Because of th... |
What organic catalysts work by lowering the activation energy needed to start biochemical reactions? | glucose | hormones | carbohydrates | enzymes | Enzymes work by lowering the activation energy needed to start biochemical reactions. |
What structure supports the body, protects internal organs, produces blood cells, and maintains mineral homeostasis? | cuticle | fossil | skin | skeleton | The skeleton supports the body, protects internal organs, produces blood cells, and maintains mineral homeostasis. |
When vertebrate animals metabolize ammonia what is the primary byproduct that is produced? | proteins | carbon monoxide | dioxide | urea | 41.4 Nitrogenous Wastes Ammonia is the waste produced by metabolism of nitrogen-containing compounds like proteins and nucleic acids. While aquatic animals can easily excrete ammonia into their watery surroundings, terrestrial animals have evolved special mechanisms to eliminate the toxic ammonia from their systems. Ur... |
Which process involves solvent separation on a solid medium? | affinity | substration | resonance | chromatography | Chromatography involves solvent separation on a solid medium. |
Plasmodesmata and gap junctions are channels between adjacent cells of what respective types? | plant and fungus | healthy and sick | new and old | plant and animal | 4.6 Connections between Cells and Cellular Activities Animal cells communicate via their extracellular matrices and are connected to each other via tight junctions, desmosomes, and gap junctions. Plant cells are connected and communicate with each other via plasmodesmata. When protein receptors on the surface of the pl... |
Natural gas burns cleaner and produces less carbon dioxide than fuels of what type? | biofuels | renewable fuels | solar energy | fossil fuels | Natural gas burns cleaner than other fossil fuels. As a result, it causes less air pollution. It also produces less carbon dioxide than the other fossil fuels. Because it burns cleaner than other fossil fuels, natural gas has a good reputation. Still, natural gas does emit pollutants. |
What are the simplest types of carbon-based compounds? | Cells | particles | Microbes | hydrocarbons | Hydrocarbons are compounds that contain only carbon and hydrogen. They are the simplest type of carbon-based compounds. |
What process moves food through the esophagus no matter which position the body is in? | homeostasis | mastication | proteolysis | peristalsis | Some people think that gravity moves food through the esophagus. If that were true, food would move through the esophagus only when you are sitting or standing upright. In fact, because of peristalsis, food can move through the esophagus no matter what position you are in—even upside down! Just don’t try to swallow foo... |
The female reproductive organs include the ovaries, fallopian tubes, uterus, and what? | bladder | intestines | womb | vagina | The female reproductive organs include the ovaries, fallopian tubes, uterus, and vagina. |
What do offsprings obtain from their parents in what is called, inheritance? | attributes | variations | mutations | characteristics | |
Warming up your body before a workout does what to the blood flow? | minimizes it | reduces it | stops it | increases it | Sometimes muscles and tendons get injured when a person starts doing an activity before they have warmed up properly. A warm up is a slow increase in the intensity of a physical activity that prepares muscles for an activity. Warming up increases the blood flow to the muscles and increases the heart rate. Warmed-up mus... |
What is a substance that increases the hydrogen ion concentration of a solution? | base | carbon | sulfur | acid | |
Scientists ask questions, and then make detailed observations to try to ask more specific questions, in order to develop what? | theories | Tests | suggests | hypothesis | A scientist is always trying to find the truth and discover new truths. How can you think like a scientist? Thinking like a scientist is based on asking and answering questions. Though you may not know it, you do this all day long. Scientists ask questions, and then make detailed observations to try to ask more specifi... |
What is the main difference between prokaryotic or eukaryotic cells ? | the presence of a Golgi Apparatus | the type of metabolic waste | the presence of cell walls | the presence of a nucleus | The answer depends on if the cell is prokaryotic or eukaryotic. The main difference between the two types of cells is the presence of a nucleus. And in eukaryotic cells, DNA lives in the nucleus. |
Supercontinents have formed at least how many times in earth history? | two | twenty | nine | five | The first continents were small but they grew over time. Supercontinents have formed at least five times in Earth history. |
How are layers of the atmosphere divided? | density gradients | air gradients | color gradients | temperature gradients | The layers of the atmosphere are divided by their temperature gradients. The lowest layer is the troposphere. All weather takes place in this layer. The next layer is the stratosphere. The stratosphere contains the protective ozone layer. More sunlight strikes at the Equator than at the poles. This is what drives the g... |
What term is used to describe molecules that contain carbon-nitrogen bonds? | nitrites | compounds | ions | amines | Amines are molecules that contain carbon-nitrogen bonds. The nitrogen atom in an amine has a lone pair of electrons and three bonds to other atoms, either carbon or hydrogen. Various nomenclatures are used to derive names for amines, but all involve the class-identifying suffix –ine as illustrated here for a few simple... |
Birds have a flow-through respiratory system in which air flows unidirectionally from the posterior sacs into the lungs, then into these? | alveoli | posterior bronchi | gills | anterior air sacs | Figure 39.14 (a) Birds have a flow-through respiratory system in which air flows unidirectionally from the posterior sacs into the lungs, then into the anterior air sacs. The air sacs connect to openings in hollow bones. (b) Dinosaurs, from which birds descended, have similar hollow bones and are believed to have had a... |
What are convection currents that occur far below the surface of the ocean called? | flat currents | subsequent currents | waves | deep currents | Deep currents are convection currents that occur far below the surface. They are caused by differences in the density of ocean water. |
Cations are attracted to anions, which are ions with what charge? | positive | similar | neutral | negative | 2.2 Chemical Bonds Each moment of life, atoms of oxygen, carbon, hydrogen, and the other elements of the human body are making and breaking chemical bonds. Ions are charged atoms that form when an atom donates or accepts one or more negatively charged electrons. Cations (ions with a positive charge) are attracted to an... |
A non-bony skeleton that forms outside of the body is known as a what? | endoskeleton | excitoskeleton | exoplate | exoskeleton | One way early land invertebrates solved these problems was with an exoskeleton. This is a non-bony skeleton that forms on the outside of the body. It supports the body and helps it retain water. As the organism grows, it sheds its old exoskeleton and grows a new one. Figure below shows the discarded exoskeleton of a dr... |
The vagina connects to which internal organ? | ovaries | artery | valves | uterus | The vagina is a cylinder-shaped organ found inside of the female body. One end of the vagina opens at the outside of the body. The other end joins with the uterus. During sexual intercourse, sperm may be released into the vagina. If this occurs, the sperm will move through the vagina and into the uterus. During birth, ... |
What is the measure of electric current? | volts | intensity | watts | ampheres | One advantage of anaerobic respiration is obvious. It lets organisms live in places where there is little or no oxygen. Such places include deep water, soil, and the digestive tracts of animals such as humans (see Figure below ). |
Name a passageway that is shared with the digestive system. | larynx | esophagus | trachea | pharynx | Next, air passes through the pharynx, a passageway that is shared with the digestive system. From the pharynx, the air passes next through the larynx, or voice box. |
What substances function as a long-term energy store in the human body and possess long carbon chains that prevent dissolving in water? | nanoparticles | hydrocarbons | steroids | triglycerides | Triglycerides function as a long-term storage form of energy in the human body. Because of the long carbon chains, triglycerides are nearly nonpolar molecules and thus do not dissolve readily in polar solvents such as water. Instead, oils and fats are soluble in nonpolar organic solvents such as hexane and ethers. |
Thermal, radiant, electrical, nuclear, and chemical are all types of what? | heating | fuel | fuel | energy | The chapter describes thermal energy, radiant energy, electrical energy, nuclear energy, and chemical energy. Which form(s) of energy are represented by each of the following?. |
Coronary arteries ans small in what? | length | density | height | diameter | |
What occurs when a substance reacts quickly with oxygen? | catalytic conversion | convection | oxidation | combustion reaction | A combustion reaction occurs when a substance reacts quickly with oxygen (O 2 ). You can see an example of a combustion reaction in Figure below . Combustion is commonly called burning. The substance that burns is usually referred to as fuel. The products of a combustion reaction include carbon dioxide (CO 2 ) and wate... |
What are the two basic types of competition called? | interference and interaction | exploitative and beneficial | weak and strong | instraspecifc and interspecific | Aggressive behavior often occurs when individuals compete for the same resources. Animals may compete for territory, water, food, or mates. There are two basic types of competition: intraspecific and interspecific. |
Algae are much simpler than protozoa. they are aquatic and contain this? | cloning factor | testes | sporozoa | chlorophyll | 22.11 Algae Algae are much simpler than protozoa. They are aquatic and contain chlorophyll. Algae can exist as a single cell or as giant seaweeds 60 m in length. Formerly, algae were classified as plants but this was incorrect as algae lack parts of true plants: leaves, stems, roots, xylem, and phloem. Since algae belo... |
What is a gram stain used to identify ? | different types of liquids | radioactivity | acids or bases | different types of bacteria | Different types of bacteria stain a different color when Gram stain is applied to them. This makes them easy to identify. Some stain purple and some stain red, as you can see in Figure below . The two types differ in their outer layers. This explains why they stain differently. |
Burning gas to run our cars is an example of how human activity is contributing to what global event? | metamorphic change | ozone change | carbon change | climate change | Flickr:futureatlas. com (http://futureatlas. com/blog/). Human activities like burning gasoline in cars are contributing to a global change in our climate . CC BY 2.0. |
The periodic table of elements is divided into what? | groups | patterns | spheres | squares | Each element has its own square in the periodic table. The square contains the chemical symbol for the element, the atomic number, and the atomic weight . The atomic weight of an element is a weighted average of its isotopes. |
Wave amplitude of a transverse wave is the difference in height between what and the resting position? | a magnitude | a valley | a cascade | a crest | Wave amplitude of a transverse wave is the difference in height between a crest and the resting position. Wave amplitude of a longitudinal wave is the distance between particles of the medium where it is compressed by the wave. |
What is secreted before ejaculation to neutralize acidic urine remaining in the urethra? | pre-cum | sperm | semen | clear mucus | |
Because conifers carry both male and female sporophylls on the same mature sporophyte, they are considered what type of plant? | dioecious | siliceous | bioecious | monoecious | Life Cycle of a Conifer Pine trees are conifers (cone bearing) and carry both male and female sporophylls on the same mature sporophyte. Therefore, they are monoecious plants. Like all gymnosperms, pines are heterosporous and generate two different types of spores: male microspores and female megaspores. In the male co... |
Who lack some of the defining traits of chordates? | Reptiles | Adult Mammals | Childern | adult humans | Adult humans lack some of the defining traits of chordates. Why are humans still classified in the chordate phylum?. |
What does convection within the earth's mantel cause? | microorganisms to move | volcanos | hurricanes | plates to move | Convection within the Earth’s mantle causes the plates to move. Mantle material is heated above the core. The hot mantle rises up towards the surface ( Figure below ). As the mantle rises it cools. At the surface the material moves horizontally away from a mid-ocean ridge crest. The material continues to cool. It sinks... |
Autoimmunity can develop with time, and its causes may be rooted in this? | spontaneous mutation | inheritance | resistance | molecular mimicry | Autoimmunity can develop with time, and its causes may be rooted in molecular mimicry. Antibodies and TCRs may bind self antigens that are structurally similar to pathogen antigens, which the immune receptors first raised. As an example, infection with Streptococcus pyogenes (bacterium that causes strep throat) may gen... |
Why does warm air rise higher in the troposphere? | it is less flourishing than cool air | it is more dense than cool air | It contains hydrogen | it is less dense than cool air | Air in the troposphere is warmer closer to Earth’s surface. Warm air is less dense than cool air, so it rises higher in the troposphere. This starts a convection cell. Convection mixes the air in the troposphere. Rising air is also a main cause of weather. All of Earth’s weather takes place in the troposphere. |
Getting the same result when an experiment is repeated is called what? | repetition | mutation | initiation | replication | Scientists also have to “check their work. ” The results of an investigation are not likely to be well accepted unless the investigation is repeated—usually many times—and the same result is always obtained. Getting the same result when an experiment is repeated is called replication . If research results can be replic... |
Some membranes have what kind of surfaces exposed to the cytoplasm? | bilayer | outer | obstructionary | hydrophobic | |
Plants and fungi cells have what basic cell structure, which animals do not have? | Cell Membrane | Cytoskeleton | Lysosomes | cell wall | Plants and fungi cells both have a cell wall, which animals do not have. |
The way in which the sun produces light is called what? | photosynthesis | tumescence | rays | incandescence | Most of the visible light on Earth comes from the sun. The sun and other stars produce light because they are so hot. They glow with light due to their extremely high temperatures. This way of producing light is called incandescence . Incandescent light bulbs also produce light in this way. When electric current passes... |
What kind of light bulb contains a thin wire filament made of tungsten that gets hot and glows? | fluorescent | black light | LED | incandescent | An incandescent light bulb produces visible light by incandescence. The bulb contains a thin wire filament made of tungsten. When electric current passes through the filament, it gets extremely hot and glows. You can learn more about incandescent light bulbs at the URL below. |
What do you call a mixture in which some particles settle out of it when it is left standing? | homogenous | emulsion | alloy | suspension | A suspension is a heterogeneous mixture in which some of the particles settle out of the mixture upon standing. The particles in a suspension are far larger than those of a solution and thus gravity is able to pull them down out of the dispersion medium (water). The typical diameter for the dispersed particles (the san... |
What do you call the process of a solid becoming a liquid? | freezing | boiling | vaporizing | melting | Substances can change phase—often because of a temperature change. At low temperatures, most substances are solid; as the temperature increases, they become liquid; at higher temperatures still, they become gaseous. The process of a solid becoming a liquid is called melting (an older term that you may see sometimes is ... |
Once a plant cell becomes specialized, what can they no longer do? | osmosis | photosynthesis | cellular respiration | divide | As plant cells grow, they also become specialized into different cell types. Once cells become specialized, they can no longer divide. So how do plants grow after that? The key to continued growth is meristem. Meristem is a type of plant tissue consisting of undifferentiated cells that can continue to divide. |
The hardest natural substance, diamond is a form of what element? | hydrogen | zirconium | zenon | carbon | Diamond is a form of carbon in which each carbon atom is covalently bonded to four other carbon atoms. This forms a strong, rigid, three-dimensional structure (see Figure below ). Diamond is the hardest natural substance, and no other natural substance can scratch it. This property makes diamonds useful for cutting and... |
Much of what type of radiation that strikes the planet is reflected back into space? | microwaves | magentic radiation | gamma rays | solar radiation | |
What particles are formed from a neutron in beta decay? | atom and proton | rust and proton | mucus and a proton | electron and a proton | In beta decay, an electron and a proton form from a neutron (another unusual particle, called an antineutrino, is also produced). Only the electron is emitted from the nucleus. How does this change the atomic number and atomic mass of the atom?. |
What class of acids do carboxylic acids fall under? | carbolic acids | hydrochloric acids | inorganic acids | organic acids | Common acids and the polyatomic anions derived from them have their own names and rules for nomenclature. The nomenclature of acids differentiates between oxoacids, in which the H+ ion is attached to an oxygen atom of a polyatomic ion, and acids in which the H + ion is attached to another element. Carboxylic acids are ... |
Plants can absorb inorganic nutrients and water through their root system, and what gas from the environment? | chemical dioxide | hydrogen dioxide | nitrogen dioxide | carbon dioxide | CHAPTER SUMMARY 31.1 Nutritional Requirements of Plants Plants can absorb inorganic nutrients and water through their root system, and carbon dioxide from the environment. The combination of organic compounds, along with water, carbon dioxide, and sunlight, produce the energy that allows plants to grow. Inorganic compo... |
Giardia is an example of a protozoa that uses flagella for what purpose? | light | reproduction | nutrients | movement | type of protozoa, such as Giardia, that moves with flagella. |
Nearly all earthquakes occur where? | in large cities | plate centers | in Asia | plate boundaries | Nearly all earthquakes occur at plate boundaries, and all types of plate boundaries have earthquakes. |
Conotoxins released by certain marine snails can bring about paralysis in humans, indicating that this toxin attacks what system? | cardiovascular | cerebral | circulatory | neurological | Can Snail Venom Be Used as a Pharmacological Painkiller? Marine snails of the genus Conus (Figure 28.25) attack prey with a venomous sting. The toxin released, known as conotoxin, is a peptide with internal disulfide linkages. Conotoxins can bring about paralysis in humans, indicating that this toxin attacks neurologic... |
What is the second largest planet in the solar system? | Mars | Venus | jupiter | saturn | Saturn is the second largest planet in the solar system ( Figure below ). Saturn’s mass is about 95 times Earth's mass. The gas giant is 755 times Earth’s volume. Despite its large size, Saturn is the least dense planet in our solar system. Saturn is actually less dense than water. This means that if there were a batht... |
Fruit comes from the ovaries of what types of plants? | sprouting | deciduous | perennial | flowering | Although flowers and their components are the major innovations of angiosperms, they are not the only ones. Angiosperms also have more efficient vascular tissues. Additionally, in many flowering plants the ovaries ripen into fruits. Fruits are often brightly colored, so animals are likely to see and eat them and disper... |
Resistors connected end to end are said to be in what? | lines | parallel | groups | series | Resistors in Series: All resistors are connected end to end. There is only one river, so they all receive the same current. But since there is a voltage drop across each resistor, they may all have different voltages across them – the sum of the voltage drops will equal the total voltage of the circuit. The more resist... |
Molar mass is equal to density multiplied by what? | molar gravity | molar energy | molar weight | molar volume | Molar mass is equal to density multiplied by molar volume. |
What plastid makes and stores other pigments? | sporozoans | pores | pores | chromoplasts | Chromoplasts are plastids that make and store other pigments. The red pigment that colors the flower petals in Figure above was made by chromoplasts. |
What effect causes global winds to blow on a diagonal over the earth's surface? | centrifugal effect | dopler effect | resonant effect | coriolis effect | Global winds occur in belts around the globe. They are caused by unequal heating of Earth’s surface. The Coriolis effect causes global winds to blow on a diagonal over the surface. Unequal heating also causes jet streams high in the troposphere. |
When members of the same species compete for the same resources, it is called what? | extinction | interspecies competition | natural selection | intraspecific competition | Intraspecific competition happens when members of the same species compete for the same resources. For example, two trees may grow close together and compete for light. One may out-compete the other by growing taller to get more available light. As members of the same species are usually genetically different, they hav... |
Antibiotics only target prokaryotic cells - they do not affect fungi, which are not prokaryotic, but instead what? | plants | chloroplasts | mammals | eukaryotic | Animal and Human Parasites and Pathogens Fungi can affect animals, including humans, in several ways. Fungi attack animals directly by colonizing and destroying tissues. Humans and other animals can be poisoned by eating toxic mushrooms or foods contaminated by fungi. In addition, individuals who display hypersensitivi... |
What do bees carry from one plant to another to facilitate plant growth and development? | fungi | nutrients | spores | pollen | Bees are beautiful creatures that help plants flourish. They carry pollen from one plant to another to facilitate plant growth and development. But, they can also be troublesome when they sting you. For people who are allergic to bee venom, this can be a serious, life-threatening problem. For the rest of us, it can be ... |
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