Question

Which statement is concering ecosystems is correct A. Stable ecosystems that are changed by natural disaster will slowly recover and may again become stabe if left alone for a long period of time B.Competition does not influence the number of organisms that live in ecosystems. C. Climatic change in the principal cause of habitat destruction in ecosystems in the last fifty years. D. Stable ecosystems, once changed by natural disaster, will never recover and become stable again, even if left alone for a long period of time.

Answer 1

A is the correct answer

Answer 2

Introduced species can threaten biodiversity because they can

a.cause desertification.


b.cause biological magnification.


c.crowd out native species.

d.reduce the amount of fertile land.

Answer 3

C is the correct answer