7. Cell Division

   Life of all multicellular organisms starts from single cell i.e. zygote . growth of every living organism depends on cell division as stated in the cell theory. every cell arises from the pre-existing cell.

7.1 cell cycle :

    Cequential events occurring in the life of a cell is called cell cycle. There are two phases of cell cycle as interphase , cell undergoes growth or rest as per the need. During m-phase, the cell undergoes division. interphase alternates with the period of division.

Interphase: interphase is the stage between two successive cell divisions. It is the longest phase of cell cycle during which the cell division. the interphase is divisible into three sub-phases as G1- phase, S-phase and G2- phase.