Because they are studying evolution and without first studying the change in environment they can not do anything
Answer:
A. Release of oxygen into the atmosphere
Explanation:
Release of oxygen into the atmosphere is the process that the plant needs energy to perform.
Answer:
The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress. It also allows cells to develop turgor pressure, which is the pressure of the cell contents against the cell wall.