The Graph Below Shows the 16-Hour Mortality Resulting from Exposing

question 49

Multiple Choice

The graph below shows the 16-hour mortality resulting from exposing talapia to different concentrations of the dinoflagellate Pfiesteria.
Had high mortality occurred in the control group it would indicate that

• A)a more robust fish species should be used; the experiment had a fundamental design flaw.
• B)the talapia had an undiagnosed preexisting illness at the beginning of the experiment.
• C)Pfiesteria was not the toxic agent responsible for the death of the fish.
• D)talapia is not suitable for captive experiments.

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