If you forget to water your favorite plant, all of the following will occur at a cellular level EXCEPT
A) turgor pressure will build up in the cell.
B) osmosis will occur.
C) the plasma membrane will shrink away from the cell wall.
D) water will move out of the vacuoles by osmosis.
E) water will move out of the cytosol by osmosis.
A
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A protein that has been negatively selected against will accumulate how many mutations relative to one that has been selected for?
A. more mutations B. fewer mutations C. about the same number of mutations D. It is impossible to tell based on the information given.
Monotremes differ from the other mammals in their
A. laying of shelled eggs. B. lack of milk-producing glands. C. fur. D. carnivorous nature. E. containing a pouch for young to live.
Your friend has never gardened before. When none of the seeds he planted germinate, he asks you to suggest why. Which is the best explanation of what occurred?
A. The monocot seeds he used were only able to produce a single cotyledon each. B. The seeds were planted too deeply and used up their reserves before reaching the surface and sunlight. C. The suspensor failed to develop into an embryo within each seed. D. All seeds require fire in order to germinate. E. Seeds take more than one season to germinate.
Cyanobacteria ____
a. are heterotrophs b. have evolved from ancient chloroplasts c. cannot fix carbon d. cannot fix nitrogen e. produce ammonia from gaseous nitrogen