A scientist, who wants to study the effects of nitrogen on wheat plants, sets up an experiment with four groups of wheat plants: group A gets 10 kilograms per hectare, group B gets 20 kilograms per hectare, group C gets 30 kilograms per hectare, and group D gets 0 kilograms per hectare. Which of the following is the control group?

Question

Quizplus · Accepted Answer

The control group is the group that does not receive the treatment being tested. In this experiment, the treatment being tested is the effect of nitrogen on wheat plants. Therefore, the control group is group D, which does not receive any nitrogen. This allows the scientist to compare the growth and development of the wheat plants in the other three groups to the growth and development of the wheat plants in the group that did not receive nitrogen.

A Scientist, Who Wants to Study the Effects of Nitrogen