S2 = S (Xi ? X)2/n ? 1 is the formula for calculating which statistical value?
A) variance B) mean C) covariance D) standard deviation
Answer: A
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Which of the following would most likely not influence the pattern of succession in a recently disturbed habitat?
A. the number of symbiotic relationships that exist in the habitat B. the amount of available sunlight C. soil composition D. the amount of open space E. existing species in the habitat
What molecule from coal-burning power plants dissolves in water vapor in the air and falls as acid
precipitation?
a. sulfuric acid b. ozone c. mercury d. sulfur dioxide e. carbonic acid
Which of the following molecules is NOT a
steroid?
a. testosterone b. estrogen c. glycerol d. cholesterol e. vitamin D
How does polyploidy differ from aneuploidy?
A. Polyploidy involves diploid chromosome sets, while aneuploidy involves haploid sets. B. Polyploidy involves changes in entire chromosome sets; aneuploidy involves less than a diploid set of chromosomes. C. Polyploidy involves monosomy; aneuploidy involves trisomy. D. Polyploidy is produced by translocations; aneuploidy by nondisjunction. E. None of these is a difference between polyploidy and aneuploidy.