Question

What is the difference between pollen grains and sperm.

Answer 1

pollen grain is gametes of male plant and sperm is gamete of male animal

Answer 2

Pollen grain-: Pollen grain is a fine coarse powdery substance comprising pollen grain which are male microgametophyte of seed plants which produce male gametes.

And

Sperm-:. Sperm is the male reproductive cell and is derived from the Greek word sperma