Which of the following observations provides the strongest evidence that fever evolved as an adaptive re-sponse to infections?
a. Direct manipulation of body temperature in animal models shows that suppressing fever leads to a faster spread of infections.
b. Treating infected experimental animals fever-suppressing medicine leads to a faster spread of infections.
c. Infections in lizards induce behavioral fever.
d. Fever accompanies many infections.
A
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Which of the following organisms does not require susceptibility testing due to predictability?
A. Staphylococcus aureus B. Enterococcus species C. Streptococcus pneumoniae D. Streptococcus pyogenes
"Since every cell in this patient's body has the same genetic change, it is most likely that . . ."
A. he acquired this change from one of his parents. B. he was exposed to mutagenic agents. C. his mother was the only source of the mutant gene. D. All of the choices are true.
An inanimate object that harbors and transmits a pathogen is a
A. reservoir. B. vector. C. fomite. D. carrier. E. source.
The enzyme ribulose bisphosphate carboxylase (Rubisco) normally adds carbon dioxide to ribulose 1,5-bisphosphate
However, it will also catalyze a competing reaction in which O2 is added to ribulose 1,5-bisphosphate to form 3-phosphoglycerate and phosphoglycolate. Assume that phosphoglycolate is a compound that cannot be used in any further reactions. If O2 and CO2 have the same affinity for Rubisco, which of the following is the lowest ratio of CO2 to O2 at which a net synthesis of sugar can occur? (a) 1:3 (b) 1:2 (c) 3:1 (d) 2:1