A P. bursaria cell that has lost its zoochlorellae is said to be aposymbiotic

It might be able to replenish its contingent of zoochlorellae by ingesting them without subsequently digesting them. Which of the following situations would be most favorable to the reestablishment of resident zoochlorellae, assuming compatible Chlorella are present in P. bursaria's habitat?
A) abundant light, no bacterial prey
B) abundant light, abundant bacterial prey
C) no light, no bacterial prey
D) no light, abundant bacterial prey


Answer: B

Biology & Microbiology

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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.

Biology & Microbiology

Denaturation of proteins will result in all

EXCEPT one of the following. Which one is it?

a. breakage of hydrogen bonds b. loss of three dimensional structure c. removal of R groups from amino acids d. alteration of enzyme activity e. endangerment of cell's life

Biology & Microbiology

Summarize the major steps involved in producing a muscle contraction beginning with motor neuron activity and

ending with sarcomere shortening. What will be an ideal response?

Biology & Microbiology

Gram-negative bacteria in the genus ________ prey on other Gram-negative bacteria

A) Bdellovibrio B) Chlamydia C) Rickettsia D) Mycoplasma E) Caulobacter

Biology & Microbiology