Why might unrelated individuals engage in altruistic acts?
A. If they are trying to mate with each other.
B. If it is possible they may mate with each other.
C. If the altruism is likely to be reciprocated.
D. The individuals are part of the same large flock.
E. None of these choices are correct.
C. If the altruism is likely to be reciprocated.
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Progressive changes in the fossil record are evidence for evolution because
A. they show descent with modification. B. they show inheritance of acquired characteristics. C. they show evolutionary change at the level of the individual. D. they show gaps in the fossil record.
Methanogens link ATP synthesis to methanogenesis by ________.
A. substrate-level phosphorylation B. the reverse TCA cycle C. electron transport to generate proton motive force D. the use of bacteriorhodopsin
An animal that can fertilize its own eggs
A. is a synchronous hermaphrodite. B. is a sequential hermaphrodite. C. produces asexually. D. a protandrous hermaphrodite. E. a protogynous hermaphrodite.
A(n) ________ is an enlarged lymph node that appears during cases of the plague.
Fill in the blank(s) with the appropriate word(s).