In DNA replication,
A: DNA polymerases add deoxyribonucleotides only to the 3? end of a growing strand.
B: the 3? end of the primer contains a free 3?-hydroxyl group.
C: the strand grows from the 3? end to the 5? end.
D: Both a and b
E: Both b and c
Answer: D: Both a and b
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A. directional selection B. genetic drift C. gene flow D. disruptive selection E. stabilizing selection
The current understanding of the membranes of the cell is based on the ________ model.
Fill in the blank(s) with the appropriate word(s).
The current state of the revision of "protistan" taxonomy is an example of which feature of good scientific practice?
A) the need to suspend judgment until enough evidence is available to make an informed decision B)base conclusions on controlled, repeatable experiments. C)be willing to change, or drop, one's hypotheses when the data warrant it. D)avoid sampling techniques that can introduce bias. E)Both A and C are correct
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Answer the following statement true (T) or false (F)