(need asap) an investigation was set up to determine the effectiveness of a particular fertilizer on the growth of bean plants. in the investigation, each of the 10 bean plants in group a was watered with 50 milliliters of a solution of distilled water and fertilizer, while each of the 10 bean plants in group b was watered with 50 milliliters of distilled water only. both groups of plants were watered every other day for 1 month and grown under identical environmental conditions. the control group for this investigation was. .

a. group a only

b. group b only

c. both group a and group b

d. neither group a nor group b

B. Group B only

Explanation:

Control group is a research group that does not receive the substance being tested in the experiment. In the case shown in the question above, the experiment sought to test the effectiveness of a specific fertilizer in the growth of bean plants. For that, plants received the fertilizer (which is the tested substance) while plants did not receive the fertilizer (received only water), in this case, the plants that received only water are the control group of this experiment.

it is b

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