試題詳解

24. Hydrangeas provide beauty and color to landscapes. Hydrangeas of the same genotype are planted in a large flower yard, which blooms different colored flowers. This phenomenon is caused by_________
(A) Environmental factors such as aluminum content and soil pH
(B) The alleles being codominant
(C) Darwin's explanation of the natural selection
(D) The fact that the mutation occurred
(E) Virus infection causes color-breaking