Genetic drift cannot occur in the same generation as natural selection.
a. true
b. false
Answer: b. false
(This is a common misconception. Genetic drift, which depends on chance events that influence reproductive success, can occur at the same as natural selection, which depends on phenotypes that influence reproductive success. Any gene can be influenced by a combination of genetic drift and natural selection, as well as mutation.)
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In a system in which temperature is uniform, free energy is
a. the energy available to do work. b. equivalent to entropy. c. the total energy absorbed by the system d. the kinetic energy of the system e. the total energy of the system.
Eyelids form and eyes open during which month of human development?
a. first month b. third month c. fifth month d. seventh month e. ninth month
Fenway Park, home of the Boston Red Sox, is situated on land that was once a fen, a kind of wetland. The replacement of the fen is an example of
A) pollution. B) overexploitation. C) habitat destruction. D) competition.
Animals that are constructed around a central axis and in which any body division along that axis results in similar halves have
A. asymmetry. B. radial symmetry. C. bilateral symmetry. D. coeloms.