Members of which of the following are the major primary producers in the marine ecosystem?
A. yeasts
B. sponges
C. sporozoans
D. Fishes
E. Diatoms
Ans: E. Diatoms
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A. ticks B. mosquitoes C. birds D. deer and field mice
When NADP+ in the light cycle it is , forming NADPH.
A. donates electrons; oxidized B. accepts electrons; reduced C. accepts electrons; stabilized D. accepts electrons; oxidized E. donates electrons; reduced
By the ______________ theory, water is pulled upward through a plant by air's drying power, which creates continuous negative pressure.
A. transpiration B. cohesion-tension C. pressure flow D. adaptive E. water-conservation
The phase of the bacterial growth curve that shows the maximum rate of cell division is the
A. log phase. B. prophase. C. stationary phase. D. lag phase. E. death phase.