Most microorganisms assimilate nitrogen as ________.
A. nitrite
B. N2
C. hydrazine
D. nitrate
Answer: D
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In New Mexico, large expanses of black lava create patches of unique habitat. If, in every generation, selection favors the darkest colored pocket mice in those habitats because they are best hidden from predators, this would be an example of:
A. balancing selection. B. stabilizing selection. C. directional selection. D. disruptional selection. E. heterozygote advantage.
________ organisms such as green and purple bacteria derive electrons from sulfide, thiosulfate, and succinate to generate NADPH
Fill in the blank with correct word.
Water molecular weight
What will be an ideal response?
Which one of the following features is unique to animals?
A. Embryonic development B. Cells organized into tissues C. Movement associated with muscle tissue and nervous tissue D. Cells without walls E. Heterotrophism