A type of transport of a solute across a membrane, up its concentration gradient, using protein carriers driven by the expenditure of chemical energy is known as
A. exocytosis.
B. osmosis.
C. active transport.
D. diffusion.
E. facilitated transport.
Answer: C
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Thrips are insects that feed on rose pollen. Scientists noted that the thrips population increased in the spring and decreased dramatically during the summer. The researchers hypothesized that food abundance was the limiting factor for the population. Which of the following types of data would be most useful for the scientists to collect at regular intervals on a designated test plot of rose plants?
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The kidney gets rid of toxic compounds.
a. true b. false