What are pollen grains ?

Pollen grain is

When the pollen grains are not trasferred from anthers to the stigma in a flower due to the barrier or fence it is reffered as (or when some natural barrier exists between androecium and gynoecium to chek self-pollination, it is known as)

See the picture of pollen grain. What sort of division helps in formation of pollen grain ?

What helps to bring pollen grains to the stigma ?

An anther has 3600 pollen grains. How many pollen mother cells must have been there to produce them?

An anther has 1200 pollen grains. How many pollen mother cells must have been there to produce them ?

The student observes pollen grains under nicroscope. It appears as below. 'X' indicates……………

When pollen grains are not transferred from rahthers to stigma in a flower, due to the physical barrier, it is called

Microspores of the following plants are also called as pollen grains

How many nuclei are present in the pollen grain?