Answer the following question given this paragraph: Some mammals are omnivores. Omnivores are heterotrophs that eat a mix of plant and animal foods. Mammals that are omnivores include bears, foxes, rats, pigs, and human beings. The chimpanzees in Figure below are also omnivorous mammals. In the wild, they eat mainly plant foods, but they supplement plants with birds, bird eggs, insects, small monkeys, and other small mammals. Their favorite and most common food, however, is fruit. Animals that eat mainly fruit are called frugivores. Q: What is the name for a kind of animal that eats a mix of plant and animal foods. Choices: - an smorgasbord - a carnivore - an herbivore - an omnivore A:
an omnivore
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Answer the following question given this paragraph: If a molecule can pass freely through a cell membrane, it will cross the membrane by diffusion ( Figure below ). The inside of the plasma membrane is hydrophobic, so certain molecules cannot easily pass through the membrane. Recall the semipermeable nature of the lipid bilayer. Molecules that cannot easily pass through the bilayer include ions and small hydrophilic molecules, such as glucose, and macromolecules, including proteins and RNA. Examples of molecules that can easily diffuse across the plasma membrane include carbon dioxide and oxygen gas. These molecules diffuse freely in and out of the cell, along their concentration gradient. Though water is a polar molecule, it can also diffuse through the plasma membrane. The diffusion of water through the cell membrane is of such importance to the cell that it is given a special name, osmosis . Q: What is the special name given to the diffusion of water through the cell membrane? Choices: - hemostasis - passive transport - electrolysis - osmosis A:
osmosis
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Answer the following question given this paragraph: Summary Changes of state are examples of phase changes, or phase transitions. All phase changes are accompanied by changes in the energy of a system. Changes from a more-ordered state to a less-ordered state (such as a liquid to a gas) areendothermic. Changes from a less-ordered state to a more-ordered state (such as a liquid to a solid) are always exothermic. The conversion of a solid to a liquid is called fusion (or melting). The energy required to melt 1 mol of a substance is its enthalpy of fusion (Hfus). The energy change required to vaporize 1 mol of a substance is the enthalpy of vaporization (Hvap). The direct conversion of a solid to a gas is sublimation. The amount of energy needed to sublime 1 mol of a substance is its enthalpy of sublimation (Hsub) and is the sum of the enthalpies of fusion and vaporization. Plots of the temperature of a substance versus heat added or versus heating time at a constant rate of heating are calledheating curves. Heating curves relate temperature changes to phase transitions. A superheated liquid, a liquid at a temperature and pressure at which it should be a gas, is not stable. A cooling curve is not exactly the reverse of the heating curve because many liquids do not freeze at the expected temperature. Instead, they form a supercooled liquid, a metastable liquid phase that exists below the normal melting point. Supercooled liquids usually crystallize on standing, or adding a seed crystal of the same or another substance can induce crystallization. Q: Changes from a less-ordered state to a more-ordered state (such as a liquid to a solid) are always what? Choices: - unbalanced - reactive - endothermic - exothermic A:
exothermic
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Answer the following question given this paragraph: Biotic factors are all of the living or once-living aspects of the environment. They include all the organisms that live there as well as the remains of dead organisms. Q: What are all of the living or once-living aspects of the environment called? Choices: - abiotic factors - photic factors - fossils - biotic factors A:
biotic factors
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