Natural selection results in organisms perfectly adapted to their environments
a. True
b. False
ANSWER: False
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The cell walls of most fungi are composed of
A. chitin. B. cellulose. C. dentine. D. peptides. E. glycerol.
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
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%
During which stage of meiosis does homologue separation occur?
A. prophase I B. anaphase I C. telophase I D. prophase II E. anaphase II