One strategy for reducing the need for application of fertilizer is to plant legumes such as alfalfa and non-legume plants such as corn in alternating years. This allows:
What will be an ideal response?
Corn to utilize nitrogen that was fixed by bacteria in the alfalfa
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Which of the following types of cloning vector can carry the largest amount of foreign DNA?
A. plasmid B. bacterial artificial chromosome C. cosmid D. bacteriophage
A houseplant is growing on your windowsill. Every Sunday, without fail, your roommate turns the plant 180 degrees. When you ask your roommate why she does that, her reply is simply, "I want straight plants." Does this method produce straight plants?
A. No. The statoliths in the plant cells do not respond to turning; the plant will grow straight whether or not your roommate turns the plant. B. No. The auxins don't respond to turning, only to light. C. Yes. Rotating the plant will even out the growth of the plant toward the light by switching where the light hits the plant every week. D. Yes. Rotating the plant redistributes the statoliths, so they remain in the bottom of each cell.
Why are small populations more affected by genetic drift than larger ones?
What will be an ideal response?
In reabsorption,
a. plasma proteins are returned to the blood. b. excess hydrogen ions are removed from the blood. c. excess water is passed on to the urine. d. nutrients and salts are selectively returned to the blood. e. drugs and foreign substances are passed into the urine.