The person known to history as "Typhoid Mary" never had typhoid fever but was identified by public health officials as a source of Salmonella enterica Typhi. Which of the following is the most accurate description of her in this scenario?
A) contact carrier
B) human carrier
C) reservoir
D) both a human carrier and a reservoir
E) a reservoir but not a carrier
D
Bloom's Taxonomy: Application
Section: Reservoirs of Infectious Diseases in Humans
Learning Outcome: 14.5
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According to Hamilton's rule, _____
A) natural selection does not favor altruistic behavior that causes the death of the altruist B) natural selection favors altruistic acts when the resulting benefit to the beneficiary, corrected for relatedness, exceeds the cost to the altruist C) natural selection is more likely to favor altruistic behavior that benefits an offspring than altruistic behavior that benefits a sibling D) the effects of kin selection are larger than the effects of direct natural selection on individuals E) altruism is always reciprocal
PPD (purified protein derivative) or tuberculin is injected intradermally to test whether an individual is infected with tuberculosis. After 48-72 hours post-injection, the test is read by measuring:
A.The intensity of the red coloration of the injection site B. The number of blebs or wheals at the injection site C. The diameter of the bleb or wheal D. The distance the bleb or wheal forms from the injection site
The ATP made during fermentation is generated by _____
A) the electron transport chain B) substrate-level phosphorylation C) chemiosmosis D) oxidative phosphorylation E) aerobic respiration
The effect of directional growth shown in the accompanying figure is known to be caused by ____
a. thigmotropism b. gravitropism c. abscisic acid d. salicylic acid e. vernalization