What is seed dispersal ?

Seed dispersal is the movement or transport of seeds away from the parent plant.
The seeds are dispersed by various ways:
(i) By winds: The light and hairy seeds of some plants are dispersed by winds. or example: grasses, seeds of aak (madar) and sunflower
(ii) By water: Some seeds are dispersed by water. These seeds and fruits have floating ability in the form of spongy or fibrous outer coat as in coconut.
(iii) By animals: Some seeds are dispersed by animals. Specially spiny seeds with hooks which get attached to the body of animals and are carried to distant places. For example: xanthium and urena.
(iv) By human: Human beings also help in the dispersal of seeds. They carry fruits to the long distances and throw their seeds there.
(v) Some seeds are dispersed when the fruits burst with sudden jerks. The seeds are scattered far from parental plant. For example: balsam and castor.