阿摩線上測驗
71. Which of the following factors can contribute to genetic variation in a population?
(A) Mutation
(B) Natural selection
(C) Genetic driftt
(D) Gene flow
(E) All of the above
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統計： A(9), B(0), C(1), D(2), E(40) #3094185
統計： A(9), B(0), C(1), D(2), E(40) #3094185
