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.
C
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A prolonged period without rain is causing a major drought in the American Midwestern states. How would you expect crops to respond initially to the stress caused by the drought?
A. They will take in more carbon dioxide. B. They will take in less carbon dioxide. C. They will release more oxygen. D. They will increase rates of photosynthesis. E. They produce fewer secondary metabolites.
Why did Mendel cut off the nascent anthers during the process of artificial cross-fertilization?
What will be an ideal response?
Why would you predict that an animal cell, but not a plant cell, might burst when placed in a hypotonic solution?
What will be an ideal response?
Under ideal conditions, the prokaryotic cell cycle can
A) occur in less than a half an hour. B) create more than two daughter cells per cell division. C) involve sexual reproduction. D) skip prokaryotic fission.