Can you elaborate on the reason disruptions of the cell cycle lead to many types of diseases such as cancer?

yes it can

Explanation:

If a checkpoint fails or if a cell suffers physical damage to chromosomes during cell division, or if it suffers a debilitating somatic mutation in a prior S phase, it may selfdestruct in response to a consequent biochemical anomaly.

Tumor suppressors. Negative regulators of the cell cycle may be less active (or even nonfunctional) in cancer cells. For instance, a protein that halts cell cycle progression in response to DNA damage may no longer sense damage or trigger a response.

it restores trees to areas where they once grew.

not sure if this what   you'r looking for would be percent composition