Answer:
Ideally, the experimental and control groups are identical. As much as possible, the two groups should overlap in every characteristic.
Explanation:
At the beginning of your study, you need your two groups to be as statistically similar as is humanly possible. That way, when you control for other variables, you can reasonably attribute any statistically significant differences at the end of the study to your intervention.
They help the plant stand straight and they also hold water in them. hope this helped! ^^
Disease, competition, and predation.
B seasonal variations in climate tend to increase with distance from the equator
