How many initiation codons are there?
A) 1
B) 3
C) 4
D) 20
A
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An igneous rock that cools rapidly is likely to have ________ crystals
A) small B) medium-sized C) large D) pink
Which of the following pairs of reagents reacts to give an ester which is an isomer of propyl acetate?
A) formic acid + 1-butanol B) propanoic acid + methanol C) butanoic acid + ethanol D) none of these
Urban growth boundaries
a. encourage development in the suburbs. b. can be implemented only in wealthier cities. c. keep growth within existing urbanized areas. d. are no longer a viable option for U.S. cities.
Different air masses have different stability because
A) the horizontal temperature variation within an air mass is fairly uniform. B) the horizontal temperature variation within an air mass is not uniform. C) the vertical temperature variation within an air mass is fairly uniform. D) the vertical temperature variation within an air mass is not uniform.