Which of the following statements about the speed of impulse conduction in a neuron is true?
a. Longer axons can transmit impulses faster than shorter ones.
b. Unmyelinated axons transmit impulses faster than myelinated ones.
c. Shorter axons can transmit impulses faster than longer ones.
d. Nerve impulses travel faster than the speed of light.
e. Unmyelinated axons with larger diameters transmit impulses faster than ones with small diameters.
e
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“Prebiotic soup” refers to
a. the interior contents of protocells. b. the cytoplasm of early prokaryotic cells. c. the mix of gases in the atmosphere that gave rise to the first organic molecules. d. the polymerized slime coating ancient clay particles. e. the accumulation of organic molecules that formed in the oceans before there was life on earth.
Species in widely separated but similar biomes often appear to display similar characteristics because of
A) convergent evolution. B) coevolution. C) mutations. D) evolutionary drift.
Which method of microbial control destroys microorganisms by oxidation of cells?
A. use of glutaraldehyde B. incineration C. steam autoclave D. use of UV radiation