The process by which chromosomes fail to
separate during meiosis is called
a. aneuploidy.
b. trisomy.
c. monosomy.
d. nondisjunction.
e. polyploidy
D
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Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
What will be an ideal response?
What produces four daughter cells?
A) Meiosis B) Mitosis C) Both of these D) Neither of these
Which of the following is true about extinction?
a) Commercial hunting and fishing are careful not to deplete animal reserves. b) There are many causes of extinctions and an animal or plant may go extinct for any of a combination of these factors. c) Overexploitation by hunting and fishing is the foremost threat to tropical animals and plants. d) Introduction of new alien species helps preserve biodiversity and slow extinction. e) Without human activity, all species would survive and there would be no extinctions.
The outermost layer of the digestive tract is the:
A) muscularis externa. B) submucosa. C) mucosa. D) serosa.