Multiple effects of a single gene is
a. expressivity.
b. penetrance.
c. codominance.
d. pleiotropy.
e. multiple alleles.
Answer: d
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Spontaneous generation _____
A) was demonstrated to occur under normal laboratory conditions by Pasteur B) apparently occurred at least onceâ€"when life on Earth began C) occurs every time a new species evolves from a preexisting species D) addresses the formation of new cells from existing cells
True or false: tonicity describes the effect of a solution on the movement of water
a. true b. false
Which suggests that life evolved from chemicals slowly increasing in complexity over a period of millions of years?
A) natural selection B) creationism C) gradualism D) chemical evolution
If two organisms look completely different but you suspect they may be related, which of the following would be the most useful information to have?
A. fossils B. anatomical information C. DNA comparisons D. None of these answers is useful.