Each infectious droplet expelled during sneezing is approximately ________ µm in diameter and may contain one or several infectious microorganisms
a. 100
b. 100
c. 10
d. 1
Answer: C
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The fruits of legumes
A. are fleshy and sweet and are dispersed by birds. B. are winged and dispersed by wind. C. split down both sides and the seeds fall out. D. have corky hulls that make them buoyant and are dispersed by water. E. have hooks that cling to mammals and are dispersed by them.
What happens to the entropy of two atoms when a covalent bond forms between them?
A. The entropy of both atoms decreases. B. The entropy is unchanged. C. One atom passes its entropy to the other. D. The entropy of both atoms increases. E. Entropy is formed as heat.
The half-life of a molecule is the time it takes for 50% of the molecule to be broken down and recycled.
Answer the following statement true (T) or false (F)
Who was the first scientist to pursue a "magic bullet" that could be used to treat infectious disease?
A) Jenner B) Pasteur C) Ehrlich D) Lister E) Semmelweis