Question

What is the difference between a mass extinction and a regular (background) extinction?(1 point)
Responses

a. Mass extinction can be caused by ecological factors like climate change and loss of habitat.

b. Mass extinction occurs over a long period of time.

c. Mass extinction involves many species over a short period of geologic time.

d. Mass extinction is ongoing and is a regular process that results from evolution.

Answer 1

c. Mass extinction involves many species over a short period of geologic time.