Hopanoids are
A) found exclusively in yeast.
B) related to cholesterol.
C) a type of glycolipid.
D) a type of phospholipid.
E) All of the above are correct.
Answer: B
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, gene swapping between two species is
A. impossible, but it happened frequently in the distant past. B. infrequent but possible; it happened more often in the distant past. C. much more frequent compared to in the distant past. D. only possible if they are in the same family of organisms, such as lions and tigers.
The probability of tossing a coin and having it be heads or tails is
A. 1/4. B. 2. C. 0. D. 1. E. 1/2.
Matter is composed of
A. atoms. B. mass. C. molecules. D. energy.
The function of a sperm cell's acrosome is to
A) carry the sperm's nucleus. B) fuse with the jelly coat of the egg cell. C) provide enzymes that help the sperm penetrate the egg. D) provide the fuel that powers the sperm.