Bacteria use restriction enzymes to ____
a. integrate viral DNA
b. destroy viral DNA
c. prevent mutation of their DNA
d. copy their genes
e. inhibit the expression of some of their genes
ANSWER: b
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Dopamine derived from the hypothalamus is the prominent hormone controlling pituitary prolactin secretion. Dopamine inhibits prolactin secretion. What do you predict would happen if the pituitary were removed from the base of the brain and transplanted to some distant place in the body (for instance on top of the kidney), such that dopamine could no longer regulate prolactin secretion? You can
assume that the transplanted pituitary will be exposed to a ready supply of blood vessels. A. Dopamine secretion would increase. B. Dopamine secretion would decrease. C. Prolactin secretion would decrease. D. Prolactin secretion would increase. E. Both dopamine and prolactin secretion would decrease.
A unidirectional process where a specific compound released by one organism has a negative effect on another organism is called
A. commensalism. B. negative cooperation. C. predation. D. amensalism.
Gastric juice
A. contains hydrochloric acid. B. digests fats. C. assists the function of saliva. D. is produced by the pancreas.
How does cellular specialization serve multicellular organisms and how might a high degree of specialization be detrimental?
What will be an ideal response?