The process that merges the gametes from two parents is
A. fertilization.
B. conjugation.
C. meiosis.
D. mitosis.
E. parthenogenesis.
A. fertilization.
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In summer, a(n) ____________________ prevents upper and lower waters from mixing. Fill in the blank(s) with the appropriate word(s)
Anthropoids arose at least:a
45 million years ago. b. 22 million years ago. c. 10.2 million years ago. d. 5 million years ago. e. 2.6 million years ago.
Why is it important that you take care of your neurons?
A) They are able to divide rapidly and can be turned into cancer cells. B) They only undergo mitosis after the brain has obtained enough sleep. C) They are unable to divide by mitosis. D) They are very susceptible to mutations of their DNA.
Primary infertility is diagnosed when a couple who has had one child has trouble conceiving a second
a. True b. False Indicate whether the statement is true or false