Intro. to plants ppt ch.10

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Intro. to plants ppt ch.10

  1. 1. INTRODUCTION TO PLANTS Characteristics of Plants Nonvascular Simple Vascular
  2. 3. Miscellaneous plant Info <ul><li>Plants live on land with some in water—range from microscopic to huge (giant sequoia) </li></ul><ul><li>1 st plants probably algae washed up on land—grew rhizoids </li></ul><ul><li>Red, yellow, or orange (think carrots) pigments found in some cells of plants are carotinoids </li></ul><ul><li>Oldest plant fossils are from the Silurian period about 420 million yrs. ago </li></ul>
  3. 4. Misc. info still <ul><li>How did algae survive? </li></ul><ul><li>adaptations such as: </li></ul><ul><li>1. rigid cell wall with cellulose </li></ul><ul><li>2. waxy, clear. Protective layer on stems and leaves called a cuticle </li></ul><ul><li>Plants in water reproduce </li></ul><ul><li>easily, simple land plants </li></ul><ul><li>still use water; later complex plants develop other methods </li></ul><ul><li>Advantages to living on land: </li></ul><ul><li>1. More direct sunlight </li></ul><ul><li>2. more carbon dioxide </li></ul><ul><li>Both helped Photosynthesis! </li></ul><ul><li>Eventually, land plants developed </li></ul><ul><li>stems and roots (became vascular). </li></ul><ul><li>Plant kingdom grouped into major divisions (same as a phylum in Animal kingdom) </li></ul>
  4. 5. <ul><li>Simple plants- NONVASCULAR -have no roots, have RHIZOIDS </li></ul><ul><li>No leaves, have leaf-like structures </li></ul><ul><li>No stems, have stem-like structures called stalks </li></ul>SEEDLESS PLANTS
  5. 6. NONVASCULAR PLANTS <ul><li>Reproduce with spores & sex cells </li></ul><ul><li>Division BRYOPHYTA </li></ul><ul><li>Are MOSSES —simple rootless plants with leaf-like growths in a spiral around a stalk, held by rhizoids </li></ul><ul><li>Also are LIVERWORTS -with a flat, leaf-like body </li></ul><ul><li>PIONEER SPECIES -are both mosses + liverworts. They are </li></ul><ul><li>the first plants going into poor/destroyed areas. </li></ul>
  6. 7. Seedless Vascular Plants: <ul><li>Use SPORES to reproduce </li></ul><ul><li>Vascular “tubes ” (tissue) present </li></ul><ul><li>Some quite tall (1 or 2 meters) </li></ul><ul><li>Include: </li></ul>Spike + club moss : <ul><li>Tiny pine cone like tops or clubby like “fat tailed” tops </li></ul>Horsetails : <ul><li>Hollow stem with joints , pops apart </li></ul>Ferns : <ul><li>Largest group no. wise , + size wise , </li></ul><ul><li>ancient tree ferns made coal deposits </li></ul>www.istockphoto.com www.istockphoto.com www.indoor-plant-care.com faculty.clintoncc.suny.edu www.worldofstock.com
  7. 8. Moss Life Cycle www.earthhistory.org.uk <ul><li>Start with: </li></ul><ul><li>Spores </li></ul><ul><li>Protonema </li></ul><ul><li>Bud </li></ul><ul><li>Gametophyte —male and female </li></ul><ul><li>Sporophyte with spore capsule- circle </li></ul>
  8. 9. <ul><li>Start with : </li></ul><ul><li>Spores </li></ul><ul><li>Prothallus </li></ul><ul><li>Sperm </li></ul><ul><li>Egg </li></ul><ul><li>Germinating sporophyte -circle </li></ul><ul><li>Sporophyte with rhizome + fiddlehead </li></ul><ul><li>(in square) </li></ul>Fern Life Cycle http://departments.bloomu.edu/biology/pics/botany/lifecycles/fern_lc.html

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