Water in the oceans tends to move in great currents from the:

a. north pole to the south pole
b. equator to the poles
c. poles to the equator
d. south pole to the north pole
e. equator to the poles and back again


e

Biology & Microbiology

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This is best described as how an animal responds to stimuli in its environment:a

behavior. b. learning. c. proximate causes. d. ultimate causes. e. direct fitness..

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At the time life arose on Earth, Earth's atmosphere contained all but which of the following?

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