Which statement best defines pregnancy?
o
a the joining of an egg and a sperm
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b. the period of about 40 weeks when a developing embryo or fetus
is in the uterus
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c. the process by which the uterus contracts to push the fetus out of
the woman's body through the vagina
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d. a fertilized egg that has begun cell division

Which of the following statements concerning cancer and mutations is correct? a: cancer can only occur with a mutation in a somatic cell. b: usually, multiple mutations are required in different genes to cause cancer. c: none of the other answer options is correct. d: cancer can only occur with a mutation in a germ cell. e: usually, a single mutation is all that is required to cause cancer.