Will make !

the cell cycle is regulated by both external and internal factors.
part a: list two external factors that influence the cell cycle and briefly describe them. (2 points)
part b: list two internal factors that influence the cell cycle and briefly describe them. (2 points)

External factors include physical and chemical signals. Growth factors are proteins that stimulate cell division. – Most mammal cells form a single layer in a culture dish and stop dividing once they touch other cells. Two of the most important internal factors are kinases and cyclins.

characterization of nanoparticles is a critical step in nanomaterial production as it provides information of dimension, morphology, surface charge, distribution and degree of surface functionalization.

it’s lava came from an explosive eruption