Question

Sharks and dolphins look very much alike--both have streamlined bodies, fins, and sharp teeth. Sharks and dolphins, however, are not closely related. The body structures that characterize sharks and dolphins have evolved independently. Which term is used by evolutionary biologists to describe the process by which two separate species may evolve in a similar way and come to resemble one another? A) adaptive radiation B) convergent evolution C) punctuated evolution Eliminate D) coordinated development

Answer 1

Convergent evolution

Answer 2

Answer:

The correct answer is option B, Convergent Evolution

Explanation:

In convergent evolution,  species in different locations evolve in a way that they resemble each other very closely due to the presence of similar environmental conditions.  For example the wings of bats, birds & insects have similar functions and structure (upto certain extent) though each of these species have evolved in different geographic locations. Such structures which develop through convergent evolution are called analogous structure.  

Here in this question, shark and dolphin have following as analogous structures –  

a) Sharp teeth

b) Fins  

c) Streamlined body