The carotid bodies detect carbon dioxide in the blood and is, therefore, a
a. chemoreceptor.
b. photoreceptor.
c. thermoreceptor.
d. mechanoreceptor.
e. movement receiver.
A
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When a population goes through a bottleneck, ____
a. genetic drift is likely to occur b. mutation rates increase c. extinction rates decrease d. natural selection decreases in intensity e. inbreeding decreases
Which of the following is caused by a vitamin C deficiency?
A. rickets B. beriberi C. scurvy D. pellagra E. blindness
Resident biota is most abundant in
a. pharynx b. large .intestine c. skin d. respiratory system
What do gametes, spores, and the gametophyte generation have in common?
A. They are all diploid. B. They are all haploid. C. They are present in vascular plants only. D. They are all produced by meiosis. E. They are all triploid.