Question

question 4
2 pts
poison ivy is a weed that produces an oil that causes skin rashes.
description: scientists want to conduct an experiment to determine if poison ivy grows taller when exposed to higher levels of carbon dioxide.
how should the control group in this experiment be treated?
the control group should have plants growing at higher oxygen levels.
the control group should have plants growing at normal carbon dioxide level.
the control group should have plants growing in different amounts of water.
the control group should have plants growing at different carbon dioxide levels.

Explanation:

In an experiment to test the effect of higher - level carbon dioxide on poison ivy growth, the control group should have normal conditions for the variable being tested. Here, the variable is carbon dioxide levels, so the control group should have plants growing at normal carbon dioxide level to provide a baseline for comparison.

Answer:

The control group should have plants growing at normal carbon dioxide level.