The pollen tube grows from the ________ to the ________, where it eventually fertilizes the egg.
A. petal; ovary
B. sepal; filament
C. anther; style
D. stigma; ovule
Answer: D
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Why is it believed that RNA was the first informational molecule to evolve?
a. RNA molecules can replicate into DNA molecules. b. RNA molecules are more central to modern inheritance than DNA. c. RNA molecules degrade more slowly in solution than DNA molecules. d. RNA molecules are much simpler structures than other macromolecules. e. RNA molecules are able to function as both enzymes and substrates for their own replication.
In the process of natural selection, individuals that are most fit are the ones that are
A. Most likely to survive B. Most likely to be physically fit C. Most likely to mutate D. Most likely to reproduce E. Most likely to migrate
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What will be an ideal response?