39. According to the biological species concept, for speciation to occur,_________.
(A) the number of chromosomes in the gene pool must change
(B) changes to centromere location or chromosome size must occur
(C) large numbers of genes that affect numerous phenotypic traits must change
(D) at least one gene, affecting one reproductive barrier, must change
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統計: A(0), B(1), C(0), D(2), E(0) #3056702
統計: A(0), B(1), C(0), D(2), E(0) #3056702