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.
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
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