Nerves would be best described as:
A) collections of motor neuron dendrites and cell bodies.
B) bundles of axons in the peripheral nervous system (PNS).
C) bundles of dendrites in the peripheral nervous system (PNS).
D) collections of sensory neuron dendrites and cell bodies.
Answer: B
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Eukaryotic cell membranes use many sterol molecules for construction, which contrasts with archaeal membranes that utilize ________.
Fill in the blank(s) with the appropriate word(s).
Paland and Lynch showed that sexual populations possessed fewer deleterious mutations than asexual populations. These results supported the hypothesis that
A. sexual reproduction prevents fertilization with gametes carrying alleles with deleterious alleles. B. sexual reproduction produces fewer random mutations than asexual reproduction. C. asexual reproduction is associated with lower genetic diversity, resulting in the accumulation of highly deleterious mutations. D. in sexual reproduction, the reassorting of alleles allows for the elimination of more detrimental alleles than in asexual reproduction. E. sexual strains are associated with higher genetic diversity and thus accumulate more beneficial mutations than asexual strains.
Cell walls are not typically possessed by ________.
A. protozoa B. bacteria C. algae D. fungi
Action potentials traveling down the plasma
membrane of a muscle fiber will next reach the _____. a. plasma membrane. b. sarcoplasmic reticulum. c. cytoskeletal system. d. T tubules. e. endomembrane system.