Genetic drift occurs in a population. Which of the following statements might be true?
A) Genetic drift increased the population's fitness.
B) Genetic drift decreased the population's fitness.
C) The population was relatively small.
D) The population experiences a decrease in genetic variation.
E) Any of the statements can be true.
Answer: E
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a. reciprocal cross b. test cross c. dihybrid cross d. monohybrid cross
The most likely reason that glucose dissolves
in water is that it is a. an ionic compound. b. a polysaccharide. c. polar and forms many hydrogen bonds with the water molecules. d. a very unstable molecule. e. highly nonpolar
Seasonal variation in solar radiation, temperature, and day length is due to the
A) tilt of the Earth's axis. B) greenhouse effect. C) Coriolis effect caused by the spinning of Earth on its axis. D) sunspot activities at the surface of the Sun.
The process indicated by the arrow in Figure 7.1 represents
A. lagging strand synthesis. B. leading strand synthesis. C. transcription. D. translation. E. recombination.