As DNA is replicated, the leading strand will have ____ RNA primer(s) and the lagging strand will have ____
A. one; one
B. one; two
C. one; many
D. many; one
E. many; many
C
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Some children are born with what are classified as congenital defects. Assume that there is a child born without a kidney on one side of the body. It is likely that something went wrong during the ___________________ trimester of pregnancy
A. first B. second C. third D. It isn't possible to know based on the information given.
Which of the following describes animals with seasonal estrus cycles?
a. fecund b. semelparity c. iteroparity d. delayed reproduction
Coral reefs grow best where water is
A) warm, shallow, and clear. B) warm, deep, and clear. C) cold, shallow, and clear. D) cold, deep, and murky.
For what reason might scientists change the most current classification system?
A) if more species became extinct B) if more types of vertebrates were discovered C) if more information became available on the evolutionary history of existing species D) if new species evolved