What Is Life? 2nd Edition by Jay Phelan

تمرين 10

Populations of Larus gulls around the North Pole show an unusual pattern of reproductive isolation: each population is able to interbreed with its neighboring populations, but populations separated by larger geographic distances are not able to interbreed. Larus gulls are an example of a(n) ______ species.
A) ring
B) polyploid
C) circular
D) Escher
E) linked