A predictable effect of genetic drift in a small population is an increase in
A. mutations.
B. dominant alleles.
C. recessive alleles.
D. genetic variation.
E. homozygosity.
E
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Growth factors such as platelet-derived growth factor function in:
A. autocrine signaling. B. paracrine signaling. C. endocrine signaling. D. juxtacrine signaling.
The resting potential of a particular nerve cell is -66 mV. Depolarization of the membrane will shift the membrane potential toward
A) -90 mV. B) -66 mV. C) 0 mV. D) There will be no change. E) There is not enough information to tell.
If a fossil is that of an animal that walked on
all four legs, which of the following would be the defining feature?
a. an S-shaped backbone b. narrow pelvis c. long pelvis d. opening located at rear of its skull e. a small brain
Lipid soluble molecules are expected to cross the cell membrane by way of:
A. simple diffusion B. signal transduction C. facilitated diffusion D. active transport E. group translocation