Chapter 29 and 30

Chapter 29 and 30 - Alteration of generation in land plants...

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Chapter 29 and 30 31/03/2008 13:06:00 Colonization of Earth by land plants  Most diversified into flowering species  Biggest differences in animals o Plant cant run away o life style is different  o plants are autotrophic (photo-auto) o nitrogen from soil and then make them into essential amino acids.  o 70% of medicines in pharmacies first came from plants. Why do plants make medicines that are good for us? o They make them as herbivore deterrents.  o Table 30.1  How Did Plants Evolve  Figure 28.4 o Nodes give ancestors  o Extant is still living  o Ancestral Eukaryote engulfed a autotrophic prokaryote cell. o Viridiaplantae- algae and higher plants.  Figure 29.4 o Ancestral alga gave rise to green algae and plants.  o Charophyceans are closest ancestors of plants  o Shared derived characteristics- something that 2 species have evolved  and that they share but not in other species. 
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Unformatted text preview: Alteration of generation in land plants Sphorophyte is stomite = diploid Figure 29.6 Figure 13.6 Apical meristem (diploid) Stem cells Give rise to more specialized differentiated cells in the leaves and roots. Know what a node is. Know what a shared derived trait is. Ferns were the first to have a vascular system Vascular system Xylem (water minerals) Phloem (sugar and organic products) Chapter 30: Seeds are important : Seed plants retain their young: the epithelium layer covered the seed so they arent free living like ferns. Retained in the ovary Fertilized by a grain or pollen Gymnosperms: Ginkgo- plants with balls and smell bad Cycads Gnetum Conifers (pines) 31/03/2008 13:06:00 31/03/2008 13:06:00...
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Chapter 29 and 30 - Alteration of generation in land plants...

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