To be To be preserved as
remains must be covered
quickly by sediments or preserved in some other way.

What is an animal that lives by preying on other animals

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

Which would happen if more forests were cut down? a. the nitrogen cycle would be stopped b. nitrogen would be fixed by bacteria more quickly c. the amount of co2 in the atmosphere would increase d. fossil fuels would build up in the soil c the amount of co2 in the atmosphere would increase