Which of the following exhibits primary succession?
A. a rock exposed by a retreating glacier
B. an abandoned farm
C. a clear-cut forest
D. newly flooded land
E. a recently burned forest
Answer: A
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In early capitalism, which cities particularly thrived?
A) cities with universities B) port cities, due to maritime trade C) walled cities due to their human-made defenses D) highland cities in the interior due to their natural defenses E) cities on the North European Plain due to the fertile soil
What season does phytoplankton peak in the northern temperate zone?
a. Spring b. Summer c. Autumn d. Winter
Standing at the top of a tall mountain, a breath of air would contain a lot fewer molecules than a
breath of air taken at sea level, but the proportion of oxygen in the two breaths of air, relative to the other constituents, would remain the same. Indicate whether the statement is true or false.
Adiabatic processes are only important for air:
A) that is polluted. B) which is rising or sinking. C) that is stagnant. D) masses which remain near the earth's surface. E) that is saturated.