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CHAPTER 29 PLANT DIVERSITY I: HOW PLANTS COLONIZED LAND Ferns in a Tasmanian Forest. Highlights of Plant Evolution. Charophyceans-green algae most closely related to land plants. Charophyceans-green algae most closely related to land plants. Charophyceans homologies with land plants:
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CHAPTER 29 PLANT DIVERSITY I: HOW PLANTS COLONIZED LANDFerns in a Tasmanian Forest
Charophyceans-green algae most closely related to land plants
Charophyceans-green algae most closely related to land plants
Charophyceans homologies with land plants: Chloroplasts Rosette cellulose-synthesizing complexes Almost identical enzymes in their perioxisomes Formation of a phragmoplast during cytokinesis and cell plate formation Sperm rRNA and cytoskeletal proteins
Apical meristems of plants shoots and roots Apical meristem
Embryo of a Liverwort Maternal tissue of the archegonium Embryo
Embryo of an Angiosperm Endosperm Maternal tissue of the archegonium Embryo Integuments
Sporangium of a Hornwort Spores Sporangium tissue
Pterophyta stem Waxey cuticle
Pterophyta Stem Phloem Xylem
Hypothetical mechanism for the origin of alternation of generations in the ancestor of plants
Phylum Bryophyta Multicellular with specialized cells and tissues but they do not contain any vascular tissue which restricts their size. Sporophytes Gametophytes
Bryophytes Mosses—Gametophyte Archegonia and antheridia grow on separate stalks of the same gametophyte so splashing water is required to transfer the sperm to the egg
Life Cycle of a Moss Bryophyte
Life Cycle of a Moss Bryophyte
Sphagnum MossGametophyte Sporophyte
protracheophyte & polysporangiophytes Fossil of an early plant with vascular tissue
Division Sphenophyta-Horsetails Silica in cell walls makes them abrasive. Sporophyte is predominant generation; homosporus;