Which of the following is the greatest cause of extinction today?
A. habitat alteration
B. agriculture
C. hunting for food
D. pollution
Answer: A
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The earliest mammals had a single line of descent into the monotremes, which are the ancestors for all modern mammals
Indicate whether the statement is true or false
The monsoon winds in summer:
a. move from the oceans over the land. b. occur only on middle latitude west coasts. c. flow from land toward the oceans. d. are a main feature of the world-wide zonal pattern of circulation.
The formation of a midlatitude anticyclone is favored
A) on the eastern side of an upper-level trough. B) on the western side of an upper-level ridge. C) on the eastern side of an upper-level ridge. D) on either the eastern or western side of a trough.
Why are temperature inversion noteworthy vis-à-vis air pollution?
A) Mesospheric conditions are replicated in the troposphere. B) Vertical mixing of pollutants is halted, trapping the pollutants under the inversion layer. C) Surface pollution is moderated by allowing surface air to mix with the air above. D) Air pollution is completely inhibited from forming.