The probability that one event or another will occur is based on which of the following?
A. Sum rule
B. Product rule
C. Chi-square test
D. Binomial expansion
E. Random sampling error
A
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The most stable parts of a cell’s cytoskeleton are the
a. microfilaments. b. microtubules. c. motor proteins. d. pseudopods. e. intermediate filaments.
Meiosis differs from mitosis in that during meiosis
a. the nuclear envelope remains intact. b. haploid cells are produced from diploid cells. c. there are two S phases. d. two haploid daughter cells are produced.
Approximately what percent of the energy that enters a trophic level becomes available to the next trophic level?
A. 2 to 12 B. 3 to 13 C. 4 to 14 D. 5 to 15 E. 5 to 30
Which of the following is normally found at the 5' end of a DNA strand?
A. a phosphate group B. a hydrogen bond C. a hydroxyl group D. histones E. a methyl group