It has been observed that organisms on many islands are different from, but closely related to, similar forms found on the nearest continent. Which of the following possible conclusions is best derived from this observation?
A) Island forms are descended from mainland forms.
B) Common environments are inhabited by the same organisms.
C) Island forms and mainland forms have identical gene pools.
D) The island forms and mainland forms are converging.

Question

Quizplus · Accepted Answer

Island forms being descended from mainland forms is the most logical conclusion, as it explains why they are different yet closely related. This pattern is often due to geographic isolation following migration, leading to evolutionary divergence while retaining a common ancestry.

It Has Been Observed That Organisms on Many Islands Are