20. The outcome of the conflict between bacteria and bacteriophage at any point in time results from
(A) evolutionary imbalance.
(B) heterozygote advantage.
(C) frequency-dependent selection.
(D) neutral variation.
(E) genetic variation being preserved by diploidy.
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統計: A(11), B(6), C(33), D(11), E(8) #2189332
統計: A(11), B(6), C(33), D(11), E(8) #2189332