The activity of acetylcholine in a synapse is terminated by its_____
A) active transport across the presynaptic membrane
B) diffusion across the presynaptic membrane
C) active transport across the postsynaptic membrane
D) diffusion across the postsynaptic membrane
E) degradation on the postsynaptic membrane
Answer: E
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How can fossils provide evidence for macroevolutionary processes, such as the divergence of two species from a common ancestor?
A. by providing a complete record of the history of life B. by exhibiting some features of ancestral organisms and some features of more derived organisms C. by preserving the bones, rather than the soft parts of ancient organisms D. by preserving a large number of organisms present in one place and one time, as is seen in Messel Shale
Intrinsically unstructured proteins:
A. have no function because they are unstructured. B. only function in membranes. C. are capable of binding to several different sites on different partners. D. are more common in bacteria than in humans. E. are only observed in diseased cells.
Which pair is mismatched?
A. Trypanosoma - causes African sleeping sickness B. Trichomonas - sexually transmitted C. Giardia - transmitted by feces in drinking water D. Plasmodium - causes Chagas disease E. Histoplasma - causes Ohio Valley fever
An ovarian follicle is indicated by
a. A. b. B. c. C. d. D. e. E.