stages of a plant to grow
TRANSCRIPT
A seed is always produced from a fruit it takes place naturally or done by man.
It is done naturally a when a animal such as a monkey eats a mango and throws the seed and that seed goes into the ground and due to the natural factors the seed starts producing root.
Beginning of a seed
‘Dispersal of seed’ means to scatter seeds over a wide area.
The same kinds of plants grow at different places because their seeds are dispersed to different places by various natural agents
The seeds and fruits of many plants are adapted for dispersal in wide areas.
Dispersal of seed
Dispersal of seed by wind those seeds which are light are dispersed by wind. for example maple, madar, cotton etc.
Dispersal of seed by water those seed which develop fibrous coat can float on water and can be easily carried away water for example coconut and water lily etc.
Methods of dispersal of seed
Dispersal of seed by animals those seeds which have hooks on them are carried away by animals or humans for example xanthium and Urena
Dispersal of seed by explosive mechanism those plants which burst with a sudden jerk and then they scatter the seeds far away from the parent plant for example castor and balsam.
Methods of dispersal of seed
0 10 20 30 40 50 60 70
5 15 35 50 75 90 105
growth of survival for plantsgrowth of survival for palnts
Graph showing dispersal of seed
The process in which a seed begins to grow is called germination of seed
For example wheat, channa , maize ,peas, all the types of pulses are seeds
All these seeds can produce when sown in the soil under certain conditions.
Germination of seed
Flowers are the reproductive parts of a plant.
The function of a flower is to ensure that fertilization should take place and to make male and female gametes.
FLOWER
The transfer of pollen grains from the anther of the stamen to
the stigma of the pistil is called pollination. It is of two types- Self pollination Cross pollination
Pollination
The fusion of male and female gametes present in ovule to form a new cell called zygote is called fertilization.
Zygote is the egg formed by the fusion of male and female gametes.
Fertilization