All of the following can lead to a positive tuberculin skin test EXCEPT
A) vaccination.
B) current tuberculosis infection.
C) previous tuberculosis infection.
D) immunity to tuberculosis.
E) being near someone with tuberculosis.
E
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A sac fungus is exposed to a mutagen, and it mutates so that it cannot produce a functional ascocarp. The most likely consequence is
A. this is a vestigial structure, so there is no consequence. B. fruiting bodies would not occur. C. asexual spores would not be produced. D. lichens could not form. E. cellular metabolism could not occur.
The production of body fat
What will be an ideal response?
The control centers for breathing, blood pressure, and heart rate are located in the medulla
Indicate whether the statement is true or false
Which term defines a relationship with a negative effect on both the actor and recipient?
A. Selfish B. Mutualistic C. Spiteful D. Altruistic