Which anatomical features are homologous?
A. the forelimb of a dog and the forelimb of a cat
B. the forelimb of a dog and the hindlimb of a cat
C. wings of a butterfly and wings of a sparrow
D. the mouth of a mosquito and the beak of a hummingbird
A. the forelimb of a dog and the forelimb of a cat
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Which factors contribute most to intraspecific competition?
A. a species' rate of reproduction and the carrying capacity of the environment B. predation and parasitism C. mutualistic relationships D. a species' fundamental niche and abiotic surroundings E. increased diversity of adaptations and resource partitioning.
Overhunting of species, such as tigers, reduces their numbers and their genetic diversity. This is an example of _____
a. a bottleneck b. a mutation
c. a founder effect d. gene flow e. genetic drift
glycolysis is the metabolic pathway in which glucose is converted into two molecules of _______
Fill in the blank(s) with the appropriate word(s).
Which statement about resting potential is true?
A) A resting membrane allows much more sodium than potassium to diffuse across it. B) The concentration of sodium is much higher inside the cell than outside. C) The resting potential exists because of differences in glucose concentration inside and outside the cell. D) The sodium-potassium pump contributes to the resting membrane potential.