In pollen mother cells,cytokinesis during meiosis is:

Which is an incorrect statement?
$I$. Each cell of sporogenous tissue in anther is capable of giving rise to a microspore tetrad.
$II$. The pollen grain represents the male gametophyte.
$III$. Pollen grains are usually triangular and $10-15 \mu m$ in diameter.
$IV$. Sporopollenin is one of the most resistant organic materials,which can be destroyed only by strong acids and alkalis.

Where is the food stored in a pollen grain?

Choose the correct option with respect to the function of the germ pore.

What is the full form of $PMC$?

Which of the following options is not correct regarding pollen grains?