Question

A crater lake formed 200 000 years ago has an unusually high diversity of fish species. The different species are very closely related to one another but extremely diverse morphologically. Which evolutionary phenomenon can explain the pattern in fish diversity in this lake?

Select one:

a. Polyploidy

b. Adaptive radiation

c. Polymorphism

d. Reinforcement

e. Frequency dependent selection

Answer 1

Polymorphism. The phenomenon of having multiple stable form of a gene. It contributes to extreme diversity within individuals of same species or closely related species.