Natural selection can increase the frequency of deleterious alleles
a. true
b. false
Answer: b. false
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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
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
In photosynthesis, the uptake of CO2 by plants occurs through openings on the surface of
A) roots. B) stems. C) leaves. D) flowers.
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