The toxins involved in intestinal infections typically
A. kill cells by inhibiting protein synthesis.
B. modify cell physiology resulting in increased secretion of water and electrolytes.
C. modify cell physiology resulting in decreased secretion of water and electrolytes.
D. kill cells by inhibiting DNA synthesis.
E. kill cells by inhibiting protein synthesis AND modify cell physiology resulting in increased secretion of water and electrolytes.
E.
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Horizontal gene transfer between host organisms and their symbionts
A) happens frequently because of coevolution. B) causes genome reduction in the symbiont and genome expansion in the host. C) causes genome reduction in both the host and the symbiont. D) has been observed, but is considered a rare event.
Synthetic anabolic steroids:
A. All of the answer options are correct. B. promote protein synthesis. C. promote anabolic metabolism to store energy within cells. D. build and strengthen muscle tissue. E. interfere with the normal production of anterior pituitary tropic hormones.
In support of the Recent Africa Origin hypothesis, the oldest dated fossils of H. sapiens found in
Africa are reliably dated at 100,000 years old. ____________________ Indicate whether the statement is true or false.
Water flowing inward through the endodermis moves next into the pericycle. Indicate whether the statement is true or false