Where may halophilic Archaea be found?
a. salt lakes
b. soda lakes
c. salted pork
d. all of the above
Answer: D
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If the immune system responds inadequately to antigenic stimulation, this is termed
A. hypersensitivity. B. autoimmunity. C. cell-mediated immunity. D. immunodeficiency.
In the light-dependent reactions of photosynthesis, an excited electron from photosystem II is passed along an electron
transport chain to ____.
a. NAD+b. NADH c. photosystem I d. oxygen e. water
Silica walls are characteristic of
A. diatoms. B. slime molds. C. euglenoids. D. red algae. E. brown algae.
Even though the autumn may be unusually
warm, the leaves from deciduous trees begin to drop during September. Which of the following is the best explanation? a. The trees are responding to shorter days. b. The autumn months are usually drier because the summer rains have tapered off. c. The effects of phototropism are operating "right on schedule." d. There is not enough sunlight to carry on photosynthesis any longer. e. None of these are the best explanation