Fern life cycle.
- Sporangia release spores.
- Spore develops into a small,
bisexual,
photosynthetic gametophyte.
- Gametophyte
produces sperm in antheridia and eggs in archegonia.
- Sperm swim to eggs in archegonia.
- Zygote develops into large
sporophyte.
- Clusters of sporangia form in sori.
Review and exercise: 