How many microspore mother cells are required to produce $100$ pollen grains in angiosperms?

Consider the following statements and choose the correct answer from the given options.
$Statement \ 1$: Innermost layer of microsporangium is tapetum.
$Statement \ 2$: Cells of tapetum possess dense cytoplasm, more than one nucleus, and nourish the developing pollen grains.

In a majority of angiosperms,at which stage is the pollen grain released?

Ubisch bodies are present in

Tectum,baculum,and foot layer are the different parts of:

In angiosperms,the male gametophyte is shed at which stage?