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

Biology & Microbiology

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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.

Biology & Microbiology

The control centers for breathing, blood pressure, and heart rate are located in the medulla

Indicate whether the statement is true or false

Biology & Microbiology

The production of body fat

What will be an ideal response?

Biology & Microbiology

Which term defines a relationship with a negative effect on both the actor and recipient?

A. Selfish B. Mutualistic C. Spiteful D. Altruistic

Biology & Microbiology