Natural selection can increase the frequency of deleterious alleles

a. true
b. false


Answer: b. false

Biology & Microbiology

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An infection acquired by a hospitalized patient that was not present when he or she entered the hospital is referred to as a(n) _____ infection

a. autonomous b. nosocomial c. opportunistic d. septic

Biology & Microbiology

In which of the following ways does a root

differ from a shoot?

a. a root only has apical meristems -- a shoot could have both b. a root lacks an epidermis- a shoot does not lack an epidermis c. roots lengthen when cells above the apical meristem elongate- in shoots, cell elongation below the apical meristem causes the shoot to lengthen d. in a root the apical meristem at the tip never changes its position- in shoots the apical meristem does change its position as the stem elongates e. all of these are differences between roots and shoots

Biology & Microbiology

In photosynthesis, the uptake of CO2 by plants occurs through openings on the surface of

A) roots. B) stems. C) leaves. D) flowers.

Biology & Microbiology

In glycolysis, a six-carbon glucose molecule is converted into two three-carbon molecules of:

a. citrate. b. acetate. c. pyruvate. d. oxaloacetate. e. coenzyme A

Biology & Microbiology