What is an R plasmid?
A) They are a plasmid that can exist in the chromosome or outside the chromosome.
B) It is an F factor that has picked up part of a bacterial genome.
C) They carry a gene for resistance to an environmental attribute, such as heavy metals, and genes for the transfer of the plasmid.
D) They function in bacterial recombination.
E) They are the plasmids that carry the F factor.
Answer: C
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Which statement correctly describes archaeal cell walls?
A. Many have peptidoglycan. B. Some have an outer layer of complex polysaccharide. C. Some have an outer layer of protein. D. Some have an outer layer of complex polysaccharide and some have an outer layer of protein.
The most oxygenated blood is indicated by the letter ____
a. A b. B c. C d. D e. E
Respiration is a physiological process by which O2 enters the internal environment and CO2 leaves by diffusing across
a(n) __________. Fill in the blank(s) with the appropriate word(s).
The rate of decomposition is greatest in
A) cold and moist environments. B) cold and dry environments. C) warm and moist environments. D) warm and dry environments.