<P> Seed dispersal is the movement or transport of seeds away from the parent plant . Plants have very limited mobility and consequently rely upon a variety of dispersal vectors to transport their propagules , including both abiotic and biotic vectors . Seeds can be dispersed away from the parent plant individually or collectively , as well as dispersed in both space and time . The patterns of seed dispersal are determined in large part by the dispersal mechanism and this has important implications for the demographic and genetic structure of plant populations , as well as migration patterns and species interactions . There are five main modes of seed dispersal : gravity , wind , ballistic , water , and by animals . Some plants are serotinous and only disperse their seeds in response to an environmental stimulus . </P>
explain the various ways in which seeds and fruits are adapted to dispersal
gravity wind ballistic water animals environmental stimulus