So here we have the pollen grain on the stigma and what happens is they germinate, the tube begins to grow like this. Tend species specific, pollen tube will complete if its the same species.
This diagram we can see the pollen tube all the way down and round to the ovule here coloured yellow.
So, descend through the pollen tube. Moves the nucleus, male nucleus travel down here and into the ovule.
There are number of things will occurred:
Pollen nucleus will fertilise the ovule and the fermentation of a zygote and this in term will grow into the embryo.
The outside of the ovule form the seed coat called "Testa".
The cotyledons is the food stores for the seedling which support plant for their first set of leaves.
Will form fruits from the wall of ovary and carpel.
great notes well done
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