Earth has experienced _______________ ice ages over the past two million years

Fill in the blank with correct word.


ANSWER: 20, twenty?

Environmental & Atmospheric Sciences

You might also like to view...

An example of point source pollution is

A. runoff from cropland. B. fertilizer runoff from lawns. C. litter from fishing boats. D. runoff from cropland. E. a drainpipe from a factory.

Environmental & Atmospheric Sciences

If you are walking through a forest dense with oak and hickory trees and thick with leaf litter underfoot, you would assume you are in a

a. tropical savanna b. temperate deciduous forest c. tropical rain forest d. temperate rain forest e. coniferous forest

Environmental & Atmospheric Sciences

Which of the following regions could be classified as arid:

a. hot and dry b. warm and dry c. cold and dry d. all of the above

Environmental & Atmospheric Sciences

Class I MHC molecules do which if the following?

A) pick up dead antigens B) seek out antigen molecules that have been synthesized inside a virus infected cell C) both a and b D) neither a nor b

Environmental & Atmospheric Sciences