Why do all of these different species of silversword plants look different if they diverged from 1 common ancestor? A. Environmental conditions on the island are not the same from island to island or even on the same island. The variations that helped each to survive were therefore different, leading each to adapt to their own environment.

B. Environmental conditions on the island are not the same from island to island or even on the same island. As a result, it was random chance that determined which plants survived, leading each to adapt to their own environment in their own way.

C. They all look different from each other due to genetic drift (specifically the Founder Effect).