SEED DISPERSAL

Post on 25-Jan-2015

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Presentation on seeds and their dispersal for Primary and Middle School kids

Transcript of SEED DISPERSAL

SEED DISPERSAL

- Traveling to survive

SOME ARE

DREAMING OF WIND

COTTON

MAPLE

SPIRALLING ITS WAY DOWN…

DANDELION

ON FEATHERY WINGS…..

A PARACHUTE

RAGWORT Feathery hairs help the

seed to float on the wind.

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.

AND SOME ARE

FLOATING AWAY

COCONUT

ON A LONG VOYAGE………

.........TO ANOTHER SHORE

POND IRIS

The seed pods break open when they ripen. Those which fall into the water float away.

LOTUS SEED

WAITING FOR A FREE RIDE

- SPEAR GRASS

XANTHIUM

THE SPINY BEAUTY

DEVIL’S CLAW

BURDOCK

BURR

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.

EXPLOSIVE DISPERSAL

PEAS They produce seed pods which dry in the sun and

explode

RUPTURED SEED PODS

THE 'PEPPER-POT'

RED CAMPIONThe containers are shaken by the

wind, scattering the seeds through the openings

GORSE

FIRING LIKE A GUN

BALSAM

STAGES OF GERMINATION

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