A scientist wants to determine the best light wavelength for growing plants. He grows plants in four test groups as shown in the table below. What, if anything, was wrong with the experiment?
A. He should only grow one plant in each group.
B. He should only change the wavelength of light for each group.
C. He should add a control group with a CO2 level of zero ppm and a light intensity of zero percent.
D. There is nothing wrong with the experiment.

The answer is option B. If a scientist wants to determine the best light wavelength for growing plants, He should only change the wavelength of light for each group.

Explanation:

In the test group, if you want to test a single variable's effect on the process you should put the other mediators constant.

Here in the experiment scientist wants to determine the best light wavelength for growing plants. In every test group, he changed the other mediators of growth [tex]\rm \bold CO_2[/tex] level and Light intensity.

So now it is impossible to determine the growth of plants is differing due to the wavelength, [tex]\rm \bold CO_2[/tex] level, or Light intensity.

A control group with a CO2 level of zero ppm and a light intensity of zero percent will not grow at all.

The number of plants is the same in each group so it will not cause any error in the results.

Hence, Option A, C, and D can be eliminated.

Therefore, we can say that if scientist wants to determine the best light wavelength for growing plants, He should only change the wavelength of light for each group.

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https://brainly.com/question/13904067?referrer=searchResults