Chapter 29 Plant Diversity I

Chapter 29 Plant Diversity I - : 29. ( 1. Plants 1...

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Chapter 29 Plant Diversity I: how plants colonized land 29.1 Land plants evolved from green algae -charophytes-green algae (closest protist relative to land plants) 1. Morphological and Molecular evidence Plants Protists that display this characteristics 1. Multicellular 2. Eukaryotic 3. Photosynthetic autotrops 1. Brown Algae 2. Red Algae 3. Some green algae 1. Cellulose made cell walls 1. Green Algae 2. Dinoflagellets 3. Brown algae 1. Chloroplast with a and b chlorophylls 1. Green algae 2. Eugenids 3. Few dinoflagellets Charophytes and Land plants PROOF 1. Rosette Cellulose-synthesizing complex 2. Peroxisome enzymes-minimize loss of organic products 3. Flagellated sperm 4. Pharagmoplast-microbule (in cell division) 2. Adaptations enabling the move to land -sporopollenin-prevents exposed zygotes from drying out during long term exposure to  non-aquatic environments. Pros of being on land Cons of being on land 1. Bright sunlight 2. Co2 3. Soil rich nutrients 4. Few herbivores and pathogens in  the beginning 1. Water scarcity 2. Lack of structural support 3. Derived traits of land plants (not in charophytes) 4 main 1. Alternation of Generation 2. Walled spores produced in sporangia 3. Multicellular gametangia
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4. Apical meristems
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