Assertion: female gametophyte | /r/HasProperty | enclosed in a pollen grain
Facets:
Source sentences:
text: The sperm of modern gymnosperms and all angiosperms lack flagella, but in cycads, Ginkgo, and other primitive gymnosperms, the sperm are still motile, and use flagella to swim to the female gamete; however, they are delivered to the female gametophyte enclosed in a pollen grain.