Question

Name the two layers of pollen grain ............................. and ...........................

Answer 1

The layers of pollen grain are :

• Exine (Outermost)
• Intine (innermost)

Let's have a look at each one of them one by one :

Exine

• It is made up of of the toughest substance known as sporopollenin that provides it the tendency for resistance against acid and other harsh and harmful conditions.
• Just because of this layer the pollen grain can be preserved for longer times
• It is heart because it performs the basic function of protection.

Intine

• This is the innermost layer and it is made up of cellulose.
• It also contains pectin deposition.
• It comes out through the germ pore.

Note :

Remember that , at the site of germpore sporopollenin is absent. Because it is the site from where actually the pollen tube comes out during the pollination phenomena.

Answer 2

the two layer of pollen grains are:

• Exine ( outermost )
• Intine ( innermost )