Two Different Species of Ciliate Are Placed in a Solution

question 69

Multiple Choice

Two different species of ciliate are placed in a solution with an unknown solute concentration. Ciliate A has a contractile vacuole firing rate of 5 per minute; ciliate B has a contractile vacuole firing rate of 12 per minute. Which of the following 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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