Vitamin D deficiency in children causes
a. acromegaly
b. rickets
c. elevated blood calcium
d. kidney stones
e. dwarfism
ANSWER: b
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Red tide neurotoxins are produced by members of
which group? a. chrysophytes b. dinoflagellates c. flagellated protozoans d. ciliates e. oomycotes
During which stages of bacterial growth is an infected patient most at risk of spreading the organism to others?
A. lag phase and exponential growth phase B. exponential growth phase and stationary growth phase C. stationary growth phase and death phase D. exponential growth phase, stationary growth phase, and death phase
Which hormone prevents the corpus luteum from degenerating?
A. LH B. estrogen C. progesterone D. hCG E. FSH
Which mass extinction led to the disappearance of the dinosaurs?
a. K–T mass extinction c. Triassic mass extinction b. Permian mass extinction d. Devonian mass extinction