Primary succession is
A. a progression that begins with a total lack of organisms.
B. a progression that begins with destruction of an existing ecosystem.
C. of very short duration.
D. All of these are correct.
Answer: A
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Ninety million Americans were born during the baby boom. During what years did the baby boom occur?
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Wind-induced surface currents are measured with __________
a) chemical tracers b) water properties c) satellites d) submerged floats