Answer:
A.
Explanation:
Because the trait undergoes a secondary loss; it has been there but it doesn't always appear in all generations.
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Botanist
Biologist/Biological Scientist: A scientist who studies living organisms and living systems. Botanist: A scientist who studies plants. Chemical Ecologist: A scientist who studies chemicals in the interactions of living organisms. Chief Scientist: A scientist who leads other scientists in a particular research area.
The fourth one that looks like an M. This is because it describes changes in population genetics in which extreme values for a trait are favored over intermediate values. In this case, the variance of the trait increases and the population is divided into two distinct groups.
