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Lanelle is studying paramecia, and is counting the contraction rate of contractile vacuoles. Which o

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Lanelle is studying paramecia, and is counting the contraction rate of contractile vacuoles. Which o

Lanelle is studying paramecia, and is counting the contraction rate of contractile vacuoles. Which of the following might best explain a sudden increase in contraction rate?

A. The solute concentration in the outside environment decreases.

B. The solute concentration in the outside environment increases.

C. The solute concentration of the outside environment matches that of the cell.

D. The glucose concentration in the outside environment increases.

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