OB55 recall that seed formation follows fertilisation, and describe seed dispersal
Seeds can be dispersed in 5 ways:
2. on Water,
3. Animals externally.
4 Animals internally .
Dispersal is the scattering of individuals away from each other.
Dispersal reduces competition and increases the chances of colonisation of new suitable habitats.
(a) Wind dispersal: fluffy style of dandelions, winged fruit of sycamore.
(b) Animal dispersal: animal food berries of the bramble (blackberry hedge).
(i) Animals externally - attaching to animals burdock fruit
(ii) Animals internally – fleshy fruits are eaten by animals and the seeds pass out later.
(c) Water dispersal: air pockets in the seed coat of the water lily.
(d) Self-dispersal: seed pod of the pea flicks out the seeds.
attaching to animals burdock fruit
– peas and beans. Pods shriver and explode to release seeds.