Which part of the life cycle does a pollen grain represent?

Question

Quizplus · Accepted Answer

A pollen grain is the male gametophyte in the life cycle of a plant. It contains two haploid cells, the generative cell which will divide by mitosis to form two sperm cells, and the tube cell which will elongate to form the pollen tube. Once the pollen grain reaches the female reproductive structure of a plant, the sperm cells will fertilize the egg cell to form a diploid zygote, which will develop into the sporophyte generation of the plant.

Which Part of the Life Cycle Does a Pollen Grain