Adaptation in populations takes place in response to
A) anticipated future needs.
B) selective pressures they have not yet experienced.
C) only the selective pressures they currently experience.
D) only selective pressures that favor survival.
C
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Throughout the Late Paleozoic, Gondwana was located ____
a. at the North Pole b. in the Northern Hemisphere c. at the equator d. in the Southern Hemisphere e. spans the Northern Hemisphere and equator at the South Pole
Which part of metabolism involves the synthesis of molecules?
A) anabolism B) catabolism C) both a and b D) neither a and b
Since 1955, the global life expectancy has risen to ____.
A. 48 years B. 52 years C. 71 years D. 75 years E. 78 years
Which of the following is not a depositional feature formed by, or in association with, a continental glacier?
A) unstratified till B) outwash plain C) lateral moraine D) esker E) kame