Gymnosperm life cycle.

  • Sporophytes bear cones.
  • Pollen cones contain microsporangia.
  • Ovulate cones contain megasporangia.
  • After pollination, a megaspore develops into a female gametophyte.
  • The pollen grain germinates a sperm cell which fertilizes an egg.
  • The ovule becomes a seed.

    Review and exercise: