In flowering plants meiosis occurs at the time of
Formation of buds
Germination of seed
Formation of root primordia
Formation of pollen grains
Describe internal structure of microsporangium.
Mark the incorrect statement
Which is incorrect statement?
$I$. Each cell of sporogenous tissue in anther is capable of giving rise to microspore tetrad.
$II$. The pollen grain represent male gametophyte.
$III$. Pollen grains are usually triangular and $10-15 \mu m$ in diameter.
$IV$. Sporopollenin is one of the most resistance organic material which can be destroyed only by strong acids
and alkali.
$A$ typical angiosperm anther is _________ and _________.