seed dispersal
DESCRIPTION
Presentation on seeds and their dispersal for Primary and Middle School kidsTRANSCRIPT
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SEED DISPERSAL
- Traveling to survive
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SOME ARE
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DREAMING OF WIND
COTTON
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MAPLE
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SPIRALLING ITS WAY DOWN…
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DANDELION
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ON FEATHERY WINGS…..
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A PARACHUTE
RAGWORT Feathery hairs help the
seed to float on the wind.
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WINGED SPINNERS
SYCAMOREWing-like outgrowths make it spin as it
falls from the parent plant. This spinning delays its fall so that the wind may carry it
some distance away.
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AND SOME ARE
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FLOATING AWAY
COCONUT
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ON A LONG VOYAGE………
.........TO ANOTHER SHORE
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POND IRIS
The seed pods break open when they ripen. Those which fall into the water float away.
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LOTUS SEED
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WAITING FOR A FREE RIDE
- SPEAR GRASS
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XANTHIUM
THE SPINY BEAUTY
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DEVIL’S CLAW
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BURDOCK
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BURR
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OFFERING THEMSELVES TO ANIMALS
BERRIES They are eaten by birds, mice, deer and even foxes.The seeds are expelled in the
droppings of the animal.
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EXPLOSIVE DISPERSAL
PEAS They produce seed pods which dry in the sun and
explode
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RUPTURED SEED PODS
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THE 'PEPPER-POT'
RED CAMPIONThe containers are shaken by the
wind, scattering the seeds through the openings
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GORSE
FIRING LIKE A GUN
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BALSAM
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STAGES OF GERMINATION
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THANKS