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Fruit Fly Control Group

APBIO-X3VVKY

Fruit flies (Drosophila melanogaster) are attracted to odors found in rotting fruit. A culture of fruit flies is placed in a choice chamber with a rotten apple on one side, and a fresh apple on the other side.

Identify an appropriate control group for this experiment.

A

Maintaining the same mass of apples on either side, so there is only one independent variable tested in the experiment.

B

Maintaining the same volume of apples on either side, so there is only one independent variable tested in the experiment.

C

Run the experiment without apples in either side of the choice chamber, to ensure that the flies are not attracted to one side of the chamber.

D

Maintaining the same temperature in both sides of the chamber, since temperature increases fruit fly activities and can affect the results.