Most conifers are ____

a. nonvascular
b. dikaryotic
c. deciduous
d. seedless
e. evergreen


ANSWER: e

Biology & Microbiology

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The topoisomerase DNA gyrase will introduce negative supercoils into DNA. What effect will this enzyme have on relaxed, covalently closed DNA?

A. The linking number will increase. B. The DNA will become overwound. C. The treated DNA will migrate farther in an agarose gel than the relaxed DNA. D. The linking number will become undefined. E. The relaxed DNA will migrate farther in an agarose gel than the treated DNA.

Biology & Microbiology

The causative agent of cholera in humans is a member of the genus ________.

A. Vibrio B. Escherichia C. Shigella D. Enterobacter

Biology & Microbiology

During Mendel's time, a widely accepted theory called ____ suggested that evolution occurred in spurts rather than by

gradual change.

a. catastrophism b. uniformitarianism c. mutationism d. natural selection e. genetic transformation

Biology & Microbiology

Protein phosphorylation is another way to alter the conformation of an enzyme and serves exclusively as a mechanism to increase enzyme activity.

a. true b. false

Biology & Microbiology