Suppose a population splits into two descendant populations prior to any evolution of dark coloration, then splits again after the evolution of dark coloration. What is the scientific term used for this situation?
a. a homoplasy c. a synapomorphy
b. an analogy d. a symplesiomorphy
C
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Animals that lack CXCR4 and CCR5 proteins are immune to HIV infection
Indicate whether the statement is true or false.
Rho-independent termination results in formation of a specialized structure that causes polymerase to stall. What is this structure called?
a. stable hairpin b. holoenzyme c. rho protein d. polyribosome
Which of the following was found to be the
main ozone destroying gas?
a. chlorofluorocarbons b. carbon dioxide c. methylmercury d. methane e. nitrogen
The rapid change in G6PD allele frequency and the correlation of this allele with areas of high rates of malaria
suggests that ____ explains this change in G6PD allele frequency. a. genetic drift b. artificial selection c. X-linked inheritance d. the founder effect e. natural selection