26. An example of a postzygotic isolating mechanism between closely related species would be which of the following? (A) One species flowers in April, the other in August. (B) The two species are pollinated by different species of bees. (C) A zygote produced by syngamy of sperm and egg of the two species contains an uneven number of chromosomes. (D) The pollen from one species will not germinate on the stigma of the other. (E) One species is terrestrial, the other totally aquatic.