Natural selection results in organisms perfectly adapted to their environments

a. True
b. False


ANSWER: False

Biology & Microbiology

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The cell walls of most fungi are composed of

A. chitin. B. cellulose. C. dentine. D. peptides. E. glycerol.

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Which is the proper order of the components of the electrical activity of the heart?

a. AV node ? Purkinje fibers ? SA node b. AV node ? SA node ? Purkinje fibers c. Purkinje fibers ? AV node ? SA node d. Purkinje fibers ? SA node ? AV node e. SA node ? AV node ? Purkinje fibers

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Suppose that both of your parents have Huntington's disease, which is caused by a dominant allele, and are both heterozygous for the disease. What are the odds of you having the disorder?

a. 100% b. 75% c. 50% d. 25%

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During which stage of meiosis does homologue separation occur?

A. prophase I B. anaphase I C. telophase I D. prophase II E. anaphase II

Biology & Microbiology