Two Different Species of Ciliate Are Placed in a Solution

question 50

Multiple Choice

Two different species of ciliate are placed in a solution with an unknown solute concentration.Ciliate A has a contractile vacuole that expels water at a rate of 5 times per minute;the contractile vacuole of ciliate B expels water 12 times per minute.What is a reasonable conclusion based on these observations?

• A) Ciliate A has a greater solute concentration than ciliate B.
• B) Ciliate B has a greater solute concentration than ciliate A.
• C) The solution has a greater solute concentration than ciliate A.
• D) The solution has a greater solute concentration than ciliate B.
• E) No conclusions can be made unless we know the solute concentration of the solution.

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