Which of the following must exist in a population before natural selection can act upon that population?
A) genetic variation among individuals
B) variation among individuals caused by environmental factors
C) sexual reproduction
D) Three of the responses are correct.
E) Two of the responses are correct.

Question

Quizplus · Accepted Answer

Natural selection depends on there being genetic differences between individuals, which allow some individuals to survive and reproduce more successfully than others.

Answer: D) Three of the responses are correct 
 Natural selection requires genetic variation among individuals, variation in traits that affects survival or reproduction, and inheritance of those traits. Sexual reproduction is not a requirement for natural selection, as it can also act on asexual populations through mutations and other mechanisms.

Which of the Following Must Exist in a Population Before