Which of the following best defines the Bohr effect?
a. The amount of a gas that diffuses across a membrane depends on the differences in the gas' partial pressure.
b. The ability of hemoglobin to bind oxygen depends on the partial pressure of oxygen.
c. In a mixture of gases, the total pressure of the mixture is the sum of the pressures of the individual gases.
d. pH causes a displacement of the oxygen-hemoglobin dissociation curve.
e. As the concentration of chloride ions increases, the ability of hemoglobin to bind carbon dioxide decreases.
d
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Which of the following defense mechanisms are found in invertebrates?
a. phagocytes b. lysozyme c. antibodies d. phagocytes and lysozyme e. phagocytes, lysozyme, and antibodies
The seasonal cessation of activities accompanied by a reduction in metabolism in response to cold temperatures during winter is called
A) hibernation. B) torpor. C) heterothermy. D) diapause.
Refer to the accompanying figure. Based on the phenotypes of the third generation, the genotype of the father in the second generation must be:
a. homozygous for albinism.
b. heterozygous for hair color.
c. heterozygous for albinism.
d. X-linked.
e. dominant
Population control factors that arise from outside the population are called
A. extrinsic limiting factors. B. density-independent limiting factors. C. intrinsic limiting factors. D. density-dependent limiting factors.