A) an individual
B) a species
C) a genus
D) a population
Correct Answer: A
Solution :
The unit of natural selection is an individual. An individual is a single form or an indivisible entity of a particular type or species. A group of individuals of the same species in a given area at a particular time and sharing a common gene pool comprise a population. A species is a group of interbreeding individuals, having a common gene pool and genetically distinct from other similar individuals. A genus is a group of similar speecies, having many similar characteristics but not having the capacity to interbreed themselves.
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