The chemical cycling principle of sustainability is driven by ____.
A. primary producers
B. detritivores
C. decomposers
D. the sun
E. human activities
Answer: D
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Warm air is less dense than cold air. Indicate whether the statement is true or false
Of the following, ________ are the major factors that determine a population's growth rate
A) adaptation, competition, birth rate, and emigration B) immigration, climate, emigration, and population distribution C) survivorship, natural selection, mutation, and extinction D) birth rate, death rate, emigration, and immigration E) limiting factors, carrying capacity, mutation rate, and inbreeding
In the base excision repair mechanism which type of bond must first be cleaved?
A) an N-C' a-glycosidic bond B) an N-C' b-glycosidic bond C) a P-O3' bond D) a P-O5' bond
Tropical cyclones produce the most intense low-pressure systems on earth. To develop and maintain this low pressure, what must happen aloft in this type of storm?
A) The storm must push the tropopause far into the stratosphere to maintain the low pressure. B) A strong jet stream flow must be present to maintain the inward flow. C) Rain must fall to force thunderstorms to collapse to keep the air circulation going. D) A strong divergent flow (outflow) aloft must keep up with, or exceed, the inflow near the surface.