are the nuclei inside the pollen grain monoploid or diploid?

Answer 1

Pollen Development:

A pollen grain is an immature male gametophyte.
It is produced within the sporangium of the anthers.
The diploid microspore mother cell will undergo meiosis and form 4 haploid microspores.
The microspores nuclei will undergo mitosis and produce a tube nucleus and a generative nucleus.
A thick wall forms around the spore in a specific pattern, producing the pollen grain or immature male gametophyte.

Answer 2

The pollen grain being the male part of the new plant is haploid(monoploid)

Answer 3

monoploid (haploid)