Viroids are characterized by all of the following except
A) circular DNA.
B) well-characterized transmission.
C) self-replicating.
D) latent forms exist in some genomes.
E) associated with plant diseases.
B) well-characterized transmission.
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Heart rate ____ in response to ____ arterial pressure
a. skips; fluctuations in b. decreases; any change in c. decreases; low d. increases; high
e. increases; lowWhich statement is NOT true?
a. Migration leads to genetic variation. b. Dominant genes always occur more frequently in a population than recessive genes. c. Nonrandom mating may result in changes in gene frequency. d. The Hardy-Weinberg law applies to large, stable populations. e. Crossing over increases variation.
The two major divisions of the vertebrate nervous
system are the a. autonomic and peripheral systems. b. sympathetic and parasympathetic systems. c. cranial and spinal nerves. d. central and peripheral nervous systems. e. brain and spinal cord.
If you close your eyes, hold your hands over your eyes for a short time, and then uncover your eyes, your pupils will be
A) a darker color than normal. B) smaller than normal. C) larger than normal. D) a lighter color than normal.