Type of cell

Type of cell: On the basis of the organisation of nucleus, cells can be divided into two type - prokaryotic cell and Eukaryota cell. (a) A prokaryotic: A prokaryotic cell does not contain any true nucleus. This is why it is called a cell with a primitive type of nucleus. The term nucleotide fits nice in this case. This are dispersed in its cytoplasm. Though the cell organelles such as mitochondria, plastics, cytoplasmic reticulated etc. are not found in a prokaryotic cells,chromosome are present in it. Only the unwrapped DNA constitutes the chromosomal structure of a prokaryotic cell. For example , blue green algae and bacteria are constituted of this type of cell. (b) In the of cell, nucleus is well structured that means nuclear materials are well organised and surrounded by a nuclear membrane. Chromosomes are organised with DNA , hi stone protein and other components. From algae to higher flowering plants and from Amoeba to advanced animals, other cell organelles are present in the cell. On the basis of function,there are two other types of cells: somatic cell and gametic cell. i. Somatic cell: This type of cell takes part in the organisms of the body of an organism. The cell divides through the process of binary fission and mitotic division. Organisms grow in this way. Moreover, cells take part in the organisation of different organs and organ systems. ii. Gametic cell: Ga metal cells are produced in which sexual reproduction and alternation of inspirations occur. Primordial germ cells divide through meiotic division and produce gametic cells. In a gametic cell, number of chromosome becomes half than that of its somatic type. A new living body is commenced after the fusion of male and female gametes. Half life fuses with another half life to produce a full life . Zygote is the first cell produced after the union of male and female gametic cells. Zygote under goes repeated mitotic division to organised a body of an organism.