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- 3. Highlights of plant evolution Simple charophyceans Complex charophyceans Mosses Liverworts Hornworts Lycophytes Ferns, horsetails, whisk ferns Gymnosperms Angiosperms
- 4. Ten phyla of extant plants Common name Approximate number of extant species Nonvascular plants (bryophytes) Division Bryophyta Division Hepatophyta Division Anthocerophyta Vascular plants Seedless vascular plants Division Lycophyta Division Pterophyta Seed plants Gymnosperms Division Coniferophyta Division Cycadophyta Division Gingkophyta Division Gnetophyta Angiosperms Division Anthophyta Mosses Liverworts Hornworts Lycophytes Ferns Conifers Cycads Gingko Gnetae Flowering plants 12,000 6,500 100 1,000 12,000 550 100 1 70 250,000
- 10. Alternation of generations in plants may have originated by delayed meiosis Meiosis delayed Zygotic mitosis produces multicellular sporophyte