What is the intine of a pollen grain made of?

$A$: The generative cell comes to lie freely in the cytoplasm of the tube cell.
$R$: The cellulosic wall around the generative cell is dissolved.

The innermost wall layer of anther:

In $Capsella$,the microsporangium possesses a nutritive layer called .......

$A$: Each cell of the sporogenous tissue is capable of giving rise to a microspore tetrad.
$R$: The most abundant type of microspore tetrad is the product of simultaneous cytokinesis.

Which part of the reproductive structure produces both enzymes and hormones?