Seed Dispersal (PowerPoint)

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					Seed Dispersal
       What is Seed Dispersal?
• The moving of a plant’s seed away from the
  parent.


         Why Seed Dispersal?
• To reduce competition
1. Wind Dispersal
         • Seeds are very light
         • Shaped so they are
           easily carried by the
           wind
         •   http://www2.bgfl.org/bgfl2/custom/resources_ftp/client_ftp/ks
             2/science/plants_pt2/wind.htm
2. Explosive
      • Fruits suddenly burst
        open releasing the
        seeds
      • Example: Peas
      •   http://www2.bgfl.org/bgfl2/custom/resources_ftp/clien
          t_ftp/ks2/science/plants_pt2/bursting.htm
3. Water
    • Fruits are waterproof
    • Fruits can float
    • Ex: Coconuts
    •   http://www2.bgfl.org/bgfl2/custom/resources_f
        tp/client_ftp/ks2/science/plants_pt2/water2.ht
        m
4. Hitchhiker

       • Seeds have hooks on
       them and become
       attached to passing
       animals
       •http://www2.bgfl.org/bgfl2/custom/resources_ftp/cl
       ient_ftp/ks2/science/plants_pt2/lift.htm
5. Animal Food
       • Seeds are enclosed in a
         tasty fruit
       • Animals eat the fruit
       • Seed passes through
         unharmed
       • Ex: Blueberries
       •   http://www2.bgfl.org/bgfl2/custom/resources_ftp/
           client_ftp/ks2/science/plants_pt2/animal.htm
                                       Other
• Drop and Roll                                 • Shakers
•   http://www2.bgfl.org/bgfl2/custom/resou     •   http://www2.bgfl.org/bgfl2/custom/resources_f
    rces_ftp/client_ftp/ks2/science/plants_pt       tp/client_ftp/ks2/science/plants_pt2/shakers.ht
                                                    m
    2/drop.htm

				
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posted:5/10/2010
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