The function of endothecium is
(c)Endothecium is hygroscopic and helps in the dehiscence of pollen sacs.
Identify labelled part $'X'$ from the figure :
Because of it pollen grains are well preserved as fossils
Pollen kit material is secreted by
Germination of pollen grain on the stigma is
How many meiotic divisions are necessary to produce $100$ pollen grains
