Answer:
Ethylene gas or pill bugs
Explanation:
The ethylene gas experiment is basically finding out if the plant hormone, ethylene, keeps leaves on the stem healthier. have a bag with a apple and a tree steam with any number of leaves on it then have the control with a tree stem that has the same number of leaves but no apple.
The Pill bug (rollie-pollies) experiment is try to determine whether or not pill bugs prefer a dry or damp environments.
