8. when testing the benefits of a new fertilizer on the
growth of tomato plants, the control group should include
which of the following? *
o
a) tomato plants grown in soil with no fertilizer
o
b) tomato plants grown in soil with the original type of fertilizer
o
c) tomato plants grown in a different type of soil with the new fertilizer
o
d) tomato plants of different varieties grown in soil with new fertilizer

A) Tomato plants grown in soil with no fertilizer

Explanation:

The control group is the group that you do not change anything. This is used as a basis or a baseline to determine whether changes you make in the experimental groups actually made a difference. An experiment is incomplete when you do not have this because it does not show any evidence that the change you made is what ellicits an effect.

what image you forgot to include it.

it also supports my hypothesis. if you rest first you can squeeze the clothespin more times. from the data i collected the average of the eight people concluded exercise makes your muscles more fatigued and less able to squeeze the clothespin compared to resting before squeezing.