All of the following are advantages of gas exchange in air, as compared to gas exchange in water,
except:a.
air is less dense than water.
b. air contains a higher concentration of oxygen.
c. less energy is needed to move air over a gas exchange surface.
d. oxygen diffuses more slowly through air than water.
e. air is less viscous than water.
D
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The point at which the rate that a deleterious allele is being eliminated from a population by natural selection is in equilibrium with the rate at which the deleterious allele is being replaced by a new mutation is termed ________
A) mutation-dependent selection B) frequency-dependent selection C) mutation-dependent equilibrium D) mutation-selection balance
An individual with a large, high quality territory is likely to have
A) a reduced number of offspring. B) decreased male-male interactions. C) increased mating success. D) reduced resources.
The pairing of homologous chromosomes occurs during which of the following?
a. mitosis b. meiosis I c. meiosis II d. All of these are correct.
Mutations that occur in somatic cells are:
A) responsible for the appearance of human diseases such as sickle-cell anemia. B) always harmful. C) never harmful. D) passed on to successive generations when they are incorporated into gametes. E) not passed on to future generations.