Populations that can interbreed and produce fertile offspring are called species
a. True
b. False
True
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Which of the following igneous rocks would be formed by the fastest cooling?
A. very coarse granite pegmatite B. volcanic glass C. fine-grained granite D. medium-grained granite E. coarse granite
Which of the following gases accounts for about 78 percent of the atmosphere's mass?
a. water vapor b. nitrogen c. ozone d. carbon dioxide
Above ________ kilometer(s), the atmospheric pressure is so slight as to not register on an ordinary barometer
A) 0.8 B) 8 C) 80 D) 800 E) 8,000
In 2008, Saudi Arabia announced that it will stop producing wheat by 2016 and will from that point on import wheat to feed its 29 million people. This decision has been made because
a. its major deep aquifer has been depleted by drawing water for irrigation b. multiple years of severe droughts have depleted the water table c. this very rich, oil-financed economy can easily import food rather than grow its own d. desalinization of sea water around Saudi Arabia has contaminated local freshwater reserves e. oil seepage from oil fields has contaminated local freshwater reserves