Answer:
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.
In this case the answer is a rock nesting on the ground
They have different versions of the gene for bristle thickness that connect together to make the bristle thickness in general.
It’s like when you have 6 toothpicks and combine two together, you’ll have 1 really thick one and the others will be small.
Ä Quick Google search shall answer your question. I honestly forgot so yea
