The following pictures show a shark,which is a fish,and a dolphin,which is a mammal.The similar body types of these two species are due to

A) divergent evolution.
B) convergent evolution.
C) genetic drift.
D) adaptive radiation.

Question

The following pictures show a shark,which is a fish,and a dolphin,which is a mammal.The similar body types of these two species are due to

A) divergent evolution. 
B) convergent evolution. 
C) genetic drift. 
D) adaptive radiation.

Quizplus · Accepted Answer

The similar body types of the shark and dolphin are due to convergent evolution. Convergent evolution occurs when unrelated species living in similar environments develop similar adaptations in response to similar selection pressures. In the case of the shark and dolphin, both species have streamlined bodies, fins for swimming, and a dorsal fin for stabilization, all of which are adaptations to living in the ocean. However, sharks are fish, while dolphins are mammals, so their genetic makeup and basic biology are very different.

The Following Pictures Show a Shark,which Is a Fish,and a Dolphin,which