R plasmids provide ____
a. antibiotic resistance
b. a fertility factor
c. transformation ability
d. genes necessary for genetic recombination
e. nutrients
ANSWER: a
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How are the membranes of many eukaryotic organisms able to remain fluid when the temperature
becomes extremely cold?
a. The percentage of unsaturated fatty acids in the membrane is increased. b. The percentage of saturated fatty acids in the membrane is increased. c. The percentage of cholesterol molecules in the membrane is increased. d. The percentage of both unsaturated fatty acids and cholesterol is increased. e. The percentage of both saturated fatty acids and cholesterol is increased.
Sucrose is composed of ____
a. two molecules of fructose. b. two molecules of glucose. c. a molecule of fructose and a molecule of glucose. d. a molecule of fructose and a molecule of galactose. e. a molecule of glucose and a molecule of galactose.
The control of gene expression is most commonly found at which juncture?
What will be an ideal response?
What advantage do ferns have over bryophytes?
A. Ferns photosynthesize B. Ferns are heterotrophs. C. Ferns have a vascular system, which allow them to grow taller. D. Ferns do not require water to reproduce. E. Ferns have alternation of generations.