Microsporogenesis is a synonym for:

How many microsporangia are located at the corners of a typical bilobed anther of angiosperm?

$A$ - Due to meiosis in $MMC$,microspore tetrads are produced.
$R$ - $MMC$ is a large cell containing dense cytoplasm and a prominent nucleus.

Complete the following flow chart:
Pollen Mother cell $\to$ Pollen tetrad $\to$ Pollen grain $\to$ Vegetative cell
Pollen Mother cell $\to$ Pollen tetrad $\to$ Pollen grain $\to$ ..........

Describe the location and function of the $Endothecium$ and $Tapetum$.

Which are the three cells found in a pollen grain when it is shed at the three-celled stage?