Biology

Plus de détails

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Reproduction of plants

Dispersion

Mechanical

Split lines Dry

Water

Buoyant Hard outer cover Water resistant

Wind

Light Flat Winged Small

animals

Fleshy Succulent Sweet Brightly coloured Scented

Pollination

Ways of pollination

Wind-polliantion

Insect-pollination

Cross-pollination

pollen grains are transferred to the stigma of a different flower on a different plant of the same species.

Self-polliantion

pollen grains are transferred to the stigma of the same flower or a different flower on the same plant.

Post-fertilisation

After successful pollination, - the ovule develops into the seed - the ovary develops into the fruit

x

Stamen

Filament

Holds anther in optimal position to release pollen grain

Anther

produces pollen grain split open to release matured pollen grains

Carpel

Stigma

secretes sugary fluids to stimulate growth of pollen grain

Style

holds stigma in optimal position for pollination

Ovary

contains one or more ovules

Sepals

Protects the other parts of the flower during the bud stage