Which of the following is a middle-level cloud type?
A) cirrostratus
B) stratocumulus
C) cumulonimbus
D) altostratus
D
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The most desirable method of dealing with hazardous wastes is ____.
A. incineration B. conversion to less hazardous materials C. perpetual storage D. deposit in ocean trenches E. recycling and reusing hazardous wastes
In some habitats, the extinction of certain amphibian species could lead to the ____ of certain species of other amphibians, aquatic insects, reptiles, birds, fish, and mammals.
A. natural selection B. speciation C. coevolution D. proliferation E. extinction
Approximately how many genes were believed to be in the human genome prior to 2000?
A) 10,000 B) 30,000 C) 100,000 D) 1,000,000
Upwelling occurs along the northern California coast because?
a. ?winds cause surface waters to move away from the coast. b. ?of seismic activity on the ocean bottom. c. ?of gravitational attraction between Earth and the Moon. d. ?water flows from the Atlantic Ocean into the Pacific because they are at different levels. e. ?of volcanic activity on the ocean floor.