Which decade holds the record for the most record highs in the United States?
A) 1930s
B) 1960s
C) 1970s
D) 1980s
E) 1990s
A
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Echinoderms and chordates are thought to be related because ____
a. both have embryonic cells with spiral cleavage
b. both have embryonic cells with radial cleavage c. both have amniote eggs d. they lived at the same time e. both have embryonic cells with nested cleavage
Convection within the inner core facilitates continental drift
Indicate whether the statement is true or false
Which condition typically contributes to major air pollution episodes lasting several days or longer?
A) a radiation inversion B) a subsidence inversion C) persistent winds D) overcast skies
The following grains are among the world's major food crops except
a. Wheat b. Soybean c. Rice d. Corn e. wheat and corn are major food crops, but not soybeans or rice