If a mutation is removed from a population due to either genetic drift or natural selection, it is said to be
A. fixed.
B. maintained.
C. extinct.
D. controlled.
E. negatively adapted.
C
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A cell that allows the complete replication cycle of a virus to take place is said to be a
A) permissive host. B) viral cell. C) dead cell. D) lytic cell.
A severe drought is an example of a density- ____ factor that can influence population size, whereas the availability of nest sites is an example of a density- ____ factor
Fill in the blank with the appropriate word.
If you have screened 100,000 pollen grains and identified 5 mutants, what is the mutation frequency?
What will be an ideal response?
Darwin read Lyell's book, Principles of Geology, while serving as ship's naturalist on the HMS Beagle. Lyell's work influenced Darwin in which of the following ways?
a. Prior to publishing On the Origin of Species, Darwin published three books on geology. b. Darwin's ideas on the gradual changes associated with evolution are biological interpretations of Lyell's uniformitarian ideas. c. By explaining Earth's dramatic geological features through uniformitarianism, Lyell conceived the world as changing across enormous expanses of time. d. All of the above.