Biology for IGCSE & O level - Variation And Selection (Section 2 - No. 47)
Which of the following is a key characteristic of a population undergoing natural selection?
All individuals in the population are genetically identical.
The environment is stable and unchanging.
There is variation among individuals in the population.
All individuals in the population are equally likely to survive.
Explanation
Natural selection acts on the pre-existing variation within a population.
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