Question

define the self pollination?​

Answer 1

pollination done within one flower... that is transfer of pollen grains to ovary is called self pollination

Answer 2

$\huge{\underline{\sf{\green{Answer-}}}}$

It is the transference of pollen grains from the anther of a flower to the stigma of either the same or genetically similar flower, accordingly self-pollination is of two types :-

Autogamy:- In which an inter sexual or perfect flower is pollinated by its own pollen. It is possible only when anther and stigma are close together.

Geitonogamy :- in which pollen grains of one flower are transferred to the stigma of another flower belonging either the same plant or genetically similar plant.

$\small{\underline{\sf{\purple{Advantages \:of \:self \:pollination :- }}}}$

• This is maintains the parental characters .

• Plant has no need to produce large amount of pollen grain.

• Flowers never develop any devices for attracting to insect pollinators.

$\small{\underline{\sf{\orange{Contrivance \: (Devices)\: to \:ensure \:self \:pollination :- }}}}$

• Flowers must be bisexual and both sexes mature at the same time.

• flowers are bisexual and cleistogamous in exceptional cases, i.e. remain closed.