Characteristics of chancroid include:
A. sexually transmitted
B. occurs mostly in the tropics and subtropics
C. lesion develops at portal of entry
D. bubolike swelling of the lymph nodes
E. All of the choices are correct.
Ans: E. All of the choices are correct.
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The nonsulfur photosynthetic bacteria use organic compounds as
A) carbon sources. B) electron donors to reduce CO2. C) energy sources. D) electron acceptors. E) oxygen sources.
Rivers typically lack a(n) (anaerobic/littoral/limnetic) zone.
Fill in the blank(s) with the appropriate word(s).
Which statement best describes the relationship between a carpel and a pistil?
A. A pistil is part of the female component of a flower and a carpel is not even a flower part at all. B. The two terms are merely two names for the same thing. C. A pistil is part of a male component of the flower whereas a carpel is part of a female component. D. A pistil is a reproductive part of a flower whereas a carpel is a showy vegetative part. E. A pistil can be composed of either a single carpel (in which case the two terms are synonymous) or of two or more carpels fused together.
A microorganism found living under conditions of high ________ is a barophile
A) pH values B) oxygen concentrations C) hydrostatic pressure D) carbon dioxide levels E) salt concentrations