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I. General plan of alternation of generations
A. Meiosis occurs in sporangia
B. Spores released
C. Independent haploid generation grows
D. Possesses specialized tissues1. Antheridia
2. Archegonia
• E. Fertilization occurs in the archegonium• F. Zygote forms• G. Grows by mitosis into mature diploid plant• H. Sporangia develops someplace• Meiosis occurs in sporangia producing
spores
II. Mosses
• A. Bryophytes– 1. no true plant organs– 2. no true tissues– 3. traps water like a sponge– 4. cannot grow very tall
B. Moss reproductive cycle
• 1. meiosis• 2. protonema• 3. gametophyte
generation• 4. archegonium• 5. antheridium• 6. fertilization• 7. zygote• 8. sporophyte generation• 9. sporangia
III. Fern reproductive cycle
• A. General plant characteristics– 1. true vascular tissue– 2. rhizomes– 3. separate sporophyte and gametophyte
generations– 4. dominant sporophyte generation