Dispersal takes place at the time of reproduction. It kccurs due to overcrowding forces acting from outside like increase I popultaion, natural selection etc. For example predominance of flightless birds on isolated islands and high mountains. Various modes of dispersal includes air, water, various organisms for example in plants which come to the plant for the nectar and helps in dispersing the seeds. Solution Dispersal takes place at the time of reproduction. It kccurs due to overcrowding forces acting from outside like increase I popultaion, natural selection etc. For example predominance of flightless birds on isolated islands and high mountains. Various modes of dispersal includes air, water, various organisms for example in plants which come to the plant for the nectar and helps in dispersing the seeds..

1. Dispersal takes place at the time of reproduction. It kccurs due to overcrowding forces acting
from outside like increase I popultaion, natural selection etc. For example predominance of
flightless birds on isolated islands and high mountains. Various modes of dispersal includes air,
water, various organisms for example in plants which come to the plant for the nectar and helps
in dispersing the seeds.
Solution
Dispersal takes place at the time of reproduction. It kccurs due to overcrowding forces acting
from outside like increase I popultaion, natural selection etc. For example predominance of
flightless birds on isolated islands and high mountains. Various modes of dispersal includes air,
water, various organisms for example in plants which come to the plant for the nectar and helps
in dispersing the seeds.