All of the following are coliforms that cause opportunistic and nosocomial infections except
A. Enterobacter.
B. Citrobacter.
C. Shigella.
D. Klebsiella.
E. Serratia.
Ans: C. Shigella.
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Movement of a molecule against a concentration gradient is
a. simple diffusion. b. facilitated diffusion. c. osmosis. d. active transport. e. passive transport
Removal of moisture by dehydration is called ________.
A. pasteurization B. desiccation C. sterilization D. flash freeze E. lyophilization
Of all the hundreds of varieties of dogs, all belong to the same ________.
Fill in the blank(s) with the appropriate word(s).
Broccoli, cabbages, and Brussels sprouts all descend from the same wild mustard and can still interbreed. These varieties were produced by
A) artificial selection. B) natural selection. C) genetic drift. D) inheritance of acquired characteristics.