Archaea, Bacteria, and Eukarya are:

A. orders
B. phyla
C. domains
D. kingdoms
E. families


Answer: C

Biology & Microbiology

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The frequency of recombination is expressed as the ratio of recombinants to the total number of progeny

A. true B. false

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Sensory receptors:a

produce internal environmental stimuli. b. convert stimulus energy to electrical energy. c. maintain a constantly hyperpolarized plasma membrane. d. produce a small amount of energy on a continual basis. e. produce action potentials of varying amplitudes in response to stimuli of differing intensities.

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In genetics, map units express the distance between:a

chromosomes during metaphase. b. two loci on a chromosome. c. alleles. d. polar bodies. e. homologous chromosomes.

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Exotoxins differ from endotoxins in that exotoxins

A) are composed of lipopolysaccharides. B) are stable at 60°C. C) cannot be converted to toxoids. D) are secreted from living cells.

Biology & Microbiology