Old existing cells.......
Answer:
If the cell has not properly copied its chromosomes, an enzyme called cyclin dependent kinase, or CDK, will not activate the cyclin, and the cell cycle will not proceed to the next phase. The cell will undergo cell death.
Explanation:
There were few records kept about the dodo birds.
The movement of particles in diffusion are determined when particles from one area go to another with little or no particles.
