A species becomes extinct when
A. individuals of two different species try to mate.
B. all individuals of a species are eliminated.
C. habitat change causes organisms to leave an area.
D. All of the statements are correct.
Answer: B
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Wind waves grow from which of the following types of waves?
a. seismic waves b. capillary waves c. seiche waves d. tsunami e. tides
The geomorphic concept that says glaciation still affects today is
(a) Legacy of the Pleistocene. (b) uniformitarianism. (c) gradualism. (d) Legacy of the Pleiocene.
What is the role of water in the asthenosphere?
A) It forms underground lakes and rivers. B) It composes part of many rock-forming minerals. C) It induces the melting of rocks. D) It acts as a solvent to dissolve rocks.
Permafrost lies beneath ____% of the land surface on Earth
a. 0 b. 10 c. 20 d. 40 e. 50