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Plants

Plants. Evolutionary Past. Cyanobacteria Blue- green algae Photosynthetic Responsible for the marked increase in Oxygen 2000 million years ago. Cyanobacteria Evidence. DNA shows the first green plants evolved from prokaryotes between 2500 and 1000 million years ago.

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Plants

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  1. Plants

  2. Evolutionary Past • Cyanobacteria • Blue- green algae • Photosynthetic • Responsible for the marked increase in Oxygen 2000 million years ago

  3. Cyanobacteria Evidence • DNA shows the first green plants evolved from prokaryotes between 2500 and 1000 million years ago. • Same chlorophyll in algae and land plants.

  4. Endosymbiosis • a symbiotic relationship between two organisms in which one of the two organisms (the endosymbiont) lives inside the body of the other one (the host).

  5. Classification of Plants • Kingdom - Plantae • Division (-phyta) • Class (-opsida) • Subclass (-idae) • Order (-ales) • Family (-aceae) • Genus • Species (Genus + specific epithet)

  6. Magnolia grandiflora • Plantae--includes all plants • Magnoliophyta--flowering plants • Magnoliopsida--dicots • Magnoliidae--subclass for Magnolia-like plants • Magnoliales--order for Magnolia-like plants • Magnoliaceae--family for Magnolia-like plants • Magnolia--genus that includes all Magnolias • grandiflora--specific epithet

  7. Circumscription of Features • A new condition is added at each step to set up a category that is MOST specific. Example: • Things with wheels = buses, cars, bicycles, skates, airplanes, trains, etc. • And is ground transport = buses, cars, bicycles, trains • And can carry more than one person = buses, cars, trains • And runs on rails = trains http://www.csdl.tamu.edu/FLORA/tfplab/lab1a.htm#taxonomy

  8. Four major lineages • Nonvascular – lack xylem & phloem & seeds • Seedless vascular – have xylem & phloem, lack seeds • Gymnosperms - have seeds, but not enclosed • Angiosperms - enclosed seeds

  9. Examples Seedless Vascular Nonvascular Dicot Angiosperm Gymnosperm Monocot

  10. Nonvascular lifecycle

  11. Seedless vascular lifecycle

  12. Gymnosperm lifecycle

  13. Angiosperm lifecycle

  14. Classes of Angiosperms • Monocotyledonae (Monocots) • Very few are annuals • Lilies, grasses, cattails, palms, yuccas, orchids, irises • Dicotyledonae (Dicots) • More primative, 1/6 are annuals • Almost all kinds of trees and shrubs • Snapdragons, mints, peas, sunflowers

  15. Monocot characteristics

  16. Dicot characteristics

  17. Parts of the flower PISTIL • Stigma • Style • Ovary STAMEN • Anther • Filament becomes the fruit becomes the seed

  18. Reproductive Organs Close up of stigma, style and anthers in a tulip

  19. Works Cited –retrieved 5/16/06 • http://www.personal.psu.edu • http://www.biology.iastate.edu • http://www.emc.maricopa.edu • http://fybio.bio.usyd.edu.au • http://scitec.uwichill.edu • http://images.google.com/images • http://www.cas.vanderbilt.edu

  20. This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.

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