How is genetic variation maintained in most populations?
A) through inbreeding
B) through cloning
C) through sexual reproduction
D) through biotechnology
E) through asexual reproduction
Answer: C
Environmental & Atmospheric Sciences
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Of central importance in a tug-of-way match is
A. increased tension in the rope. B. friction between the feet and ground. C. one's grip on the rope. D. staying power.
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Metals are relatively more abundant in
A. new stars. B. old stars. C. neither in particular
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________ denotes the vast amount of time that precedes the Paleozoic Era.
A. Cenozoic B. Quaternary C. Mesozoic D. Paleozoic E. Precambrian
Environmental & Atmospheric Sciences
The cascading forward motion of breaking waves as they rush upon the shore is called ________
A) an oscillation wave B) swash C) backwash D) wave refraction E) a littoral current
Environmental & Atmospheric Sciences