Fact 1: Pollen consists of tiny grains that are the male gametes of plants.

Fact 2: Animals that reproduce sexually produce sex cells, or gametes.

Given the two facts above, answer the question "What does pollen consist of tiny grains of?" with the following options: 
- it helps plants in growing
 - the female sexual organs
 - Something with exactly eight protons
 - seeds
 - Microscopic organisms
 - the male sex cells of plants
 - bees
 - sub-units of species


 

      the male sex cells of plants   