In both progeria and Werner syndrome, cells are switched from a growth to a maintenance mode, halting
____________________. Fill in the blank(s) with the appropriate word(s).
ANSWER: divisions
cell divisions
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Edward Jenner's work involved
A. inoculation of dried pus from smallpox pustules into a person to stimulate immunity. B. immunization using a related, less pathogenic organism to give protection against a more pathogenic one. C. development of an immunization to protect people against cowpox. D. development of passive immunotherapy.
Which scientist described inclusive fitness as the effect an individual has on propagating its alleles through its own reproduction and through kin selection?
A. Darwin B. Hamilton C. Mendel D. Tinbergen E. Wallace
Why is the absence of atmospheric oxygen (O2) so important to the Oparin-Haldane hypothesis?
a. Oxygen is corrosive and thus would have degraded many of the metallic compounds on the surface, releasing toxic gasses into the new atmosphere. b. Oxygen is more reduced than hydrogen gas, methane, or ammonia. c. Oxygen would have supported microorganisms that help chemical decay proceed. d. Oxygen is able to reverse reactions by removing electrons and hydrogen from organic molecules, thus destroying the first organic compounds as quickly as they developed. e. Oxygen would have caused multiple explosions, converting chemical energy into heat energy and rendering that energy unavailable for driving the synthesis of organic molecules.
Divergence may lead to
a. genetic drift. b. speciation. c. genetic equilibrium. d. gene flow. e. all of these.