Lect07S2011 - Phylum: Anthophyta Phylum: (Flowering Plants)...

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Phylum: Anthophyta (Flowering Plants) Phylum: Anthophyta (Flowering Plants) Also known as Angiosperms Also known as Angiosperms
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Question Question Seed plants became dominant as the terrestrial habitat became dryer because: a. They required less water to grow. b. They were the first group of plants to evolve vascular tissue. c. They did not require water for sexual reproduction. d. They evolved roots e. Both b and d are correct.
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Mass Extinction of Gymnosperms Mass Extinction of Gymnosperms Gymnosperms dominant during Triassic and Jurassic. Mass extinction of gymnosperms and many other groups of organisms at end of Cretaceous about 65MYA. Several theories as to why this occurred.
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Mass Extinction Theories Mass Extinction Theories Artistic interpretation of asteroid impact 65MYA.
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Mass Extinction Theories Mass Extinction Theories Volcanic activity Ice age Disease Gradual change in climate
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A Few Words About Angiosperms A Few Words About Angiosperms From the Greek Angion Angion- vessel, sperm: sperm: seed borne in a vessel (=fruit). Fruit : Mature ovary of flower. Sexual organs produced in flowers. Most diverse and successful plants . . Dominant plant after end of Cretaceous Period.
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World reliant on angiosperms: All food crop are angiosperms. Fibers from angiosperms for clothing. Herbs and spices mostly angiosperms. Many pharmaceuticals from angiosperms. A Few Words About Angiosperms A Few Words About Angiosperms
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Gymnosperms vs Angiosperms Morphological and anatomical differences: Xylem composition. Xylem composition. Gametophytes in cones vs Gametophytes in cones vs flowers flowers Naked seeds vs protected Naked seeds vs protected seeds in fruits. seeds in fruits. Pollination mechanisms. Pollination mechanisms. Seed dispersal mechanisms. Seed dispersal mechanisms.
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This note was uploaded on 08/09/2011 for the course BIOL 172 taught by Professor Huddleston,m during the Spring '08 term at University of Hawaii, Manoa.

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Lect07S2011 - Phylum: Anthophyta Phylum: (Flowering Plants)...

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