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| controls movement of materials into and out of the cell |
| diffusion of fluids through membranes or porous partitions |
| cell cycle | |
| —n | |
| the growth cycle of eukaryotic cells. It is divided into five stages, known as G0, in which the cell is quiescent, G1 and G2, in which it increases in size, S, in which it duplicates its DNA, and M, in which it undergoes mitosis and divides | |
cell cycle n.
The series of biochemical and structural events involving the growth, replication, and division of a eukaryotic cell.