Cellular Energy and Reproduction — Test

Question 1 • CMS 2026-2027 Biology CREDIT RECOVERY

Which option would allow Stella to set up a control group for the experiment?

Answer

She should place one flower in a similar container, but not pump carbon dioxide into it.

She should give all the flowers the same amount of water.

She should give the plants receiving the least cap c cap o sub 2 a little more oxygen to compensate for the difference in gases.

She should provide mist to each of the plants except one plant to keep the air moist and fertilize the plants.

Explanation

A control group provides a comparison without the factor being tested. Stella can place one flower in a similar container but not pump carbon dioxide into it, then compare it with flowers exposed to carbon dioxide. Giving every flower the same amount of water does not create a control group because it does not remove the tested factor.

AI-written and checked against the verified answer.

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