Every human society recognizes the existence of some kind of kinship system in the whole world. Today kinship plays a vital role in controlling individual behavior and in maintaining social cohesion.
Mitosis is known as the somatic cell division as it occurs in the somatic cells for vegetative growth. It is an equational type of cell division, resulting in two daughter cells equal with number of chromosomes and identical genes as that of parent cell.
Plastids are double membraned organelles which are found in plant cells only. They are usually spherical or discoldal in shape and their average size is 4 to 6 um. A plastid shows tow distinct regions-grana and stroma Grana are stacks of membrane-bound, flattened, discold sacs containing chlorophyll molecules.