If the cell cycle is carefully controlled by proteins that are present only temporarily to help turn on the cell cycle (i. e. growth factors) and other proteins that halt the cycle (checkpoint proteins), what do you suppose would happen if a cell was continuously exposed to growth factors?

Cancer

Explanation:

In all types of cancer, some of the body´s cells begin to divide without stopping and spread into surrounding tissues.

When cancer develops, the cells become more and more abnormal, old aor damaged cells survive when they should die, and new cells form when they are not needed.  These extra cells can divide without stipping and may form growths called tumors

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

compost can be added to topsoil as a:

pesticide