A dangerous form of diarrhea complicated by anemia may be caused by

a. Staphylococcus aureus.
b. Clostridium botulinum.
c. Escherichia coli.
d. Mycobacterium tuberculosis.
e. Helicobacter pylori.


C

Biology & Microbiology

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Which forms of nitrogen are readily usable by plants?

a. NH3, NH4+ and NO3- b. NH4+ and NO2- c. N2 and NH3 d. NH4 and NH3 e. NO3- and NO4-

Biology & Microbiology

Prior to 1972, a pesticide called DDT was used widely in the United States, but was found to pose risks to human health and wildlife. It was found that DDT contaminated the waterways. Where would the concentration of the nonpolar pesticide been the highest?

A. a seagull B. a mosquito larva C. plankton D. algae E. a minnow

Biology & Microbiology

An ECG measures ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

The carbamino effect describes a change in the conformation of hemoglobin that is induced by a(n)

A) decrease in temperature. B) increase in pH. C) decrease in pH. D) increase in CO2. E) increase in temperature.

Biology & Microbiology