___________ separates the theca in a bilobed anther

____________ develop into pollensacs

the correct sequence of wall layers in a typical anther is

The cells of this layer are having more than one nucleus and dense cytoplasm

cells of sporogenous tissue under go which division to form microspore tetrad

size of pollen is approx _________ micrometers in diameter

The outermost layer of pollengrain is made up of a resistant substance called

The points where sporopollenin is absent in exine is called

intine is the inner wall of pollen grain and is made up of

The cell of pollengrain with large food reserves is

in what % of species pollengrains are shed in 2 celled stage

generative cell divides to give rise to ---------- male gametes

--------------is the cause of pollen allergy

Pollens are stored in liquid nitrogen at a temperature