When the back of a male stickleback turns blue, this signal is perceived by females
A) to indicate danger to the school.
B) to describe the location of food.
C) as an example of courtship behavior.
D) to signal the beginning of the mating season.
E) to delimit territory.
C
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Conserved arrangements of segments of DNA in related genomes are referred to as
A. synteny. B. homology. C. analogous DNA. D. a contig. E. a comparative genome.
Cleft palate is ____
a. controlled only by genetics b. a continuously distributed trait c. controlled by a single gene pair d. only transmitted from father to son e. explained by the threshold model of complex t
A 0.01 M solution of a substance has a pH of 2. What can you conclude about this substance?
A) It is a strong acid that dissociates completely in water. B) It is a strong base that dissociates completely in water. C) It is a weak acid. D) It is a weak base.
Some enveloped animal viruses enters a host cell by
A. injecting their DNA or RNA into the host cell. B. fusion of their envelope with the host cell's plasma envelope. C. endocytosis. D. All of the above. E. Both B and C.