If the generation time of a bacterium is one hour, assuming you start with one bacterium, how many bacteria will be present after three hours?
A) four
B) six
C) eight
D) three
Ans: C) eight
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Which of the following statements about plants grown in hydroponic culture is true?
A. They no longer need to transport water through their xylem. B. They cannot be used for commercial purposes. C. They rarely get enough micronutrients. D. They are unable to photosynthesize. E. They are suspended with their roots in a nutrient solution.
Movement of a molecule against a concentration
gradient is a. simple diffusion. b. facilitated diffusion. c. osmosis. d. active transport. e. bulk flow.
The systematic patterns of water movement are known as
A) circulations. B) currents. C) gyres. D) trade winds.
E. coli cells typically make most of their ATP by metabolizing glucose. Under the conditions of this experiment, as time passed, E. coli generation times should be _____
A) the same as in the typical environment B) faster than in the typical environment C) slower than in the typical environment