Which term describes an elevated body temperature that fluctuates, but doesn't reach normal in the course of the fluctuations?
A) remittent fever
B) intermittent fever
C) Pel-Ebstein fever
D) relapsing fever
E) sustained fever
Answer: A
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How does the proton motive force lead to production of ATP?
A) ATPase requires one proton to make one ATP. B) Protons must be pumped against a concentration gradient from outside of the cell into the cell to rotate the F0 subunit of ATPase for the F1 subunit to make ATP. C) Oxidative phosphorylation of ADP by ATP synthase requires protons as cofactors in the reaction. D) Translocation of three to four protons drives the F0 component of ATPase which in turn phosphorylates one ADP into ATP.
Which organism(s) is/are acid-fast?
A. Nocardia B. Pseudomonas C. E. coli D. Mycobacterium E. Nocardia AND Mycobacterium
Zebra mussels were introduced into Lake St. Clair around 1988
The table lists the population densities (in grams dry weight per square meter of lake bottom) of native unionid mussels and exotic zebra mussels in the lake before and after this introduction. Both groups feed by filtering small particles from the water. Based on the information given, which of the following best describes the likely relationship between zebra mussels and unionids? Year Unionids Zebra mussels 1986 4.5 0.0 1990 3.7 4.6 1992 1.3 3.4 1994 0.1 3.2 A) Zebra mussels and unionids have no effect on each other. B) Zebra mussels exert a density-independent control on unionid populations. C) Zebra mussels exert a density-dependent control on unionid populations. D) Unionids exert a density-dependent control on zebra mussel populations. E) Unionids exert a density-independent control on zebra mussel populations.
One secondary spermatocyte ultimately produces ____ mature sperm
a. 1 b. 2 c. 3 d. 4 e. 8