What is the tiny male gametophyte enclosed in a tough capsule?
calcium
Cell Capsule
nitrogen
pollen
Pollen is a tiny male gametophyte enclosed in a tough capsule. Pollen carries sperm to an ovule while preventing the sperm from drying out. Pollen grains can't swim, but they are very light, so the wind can carry them. Therefore, they can travel through air instead of water.