Pollination (Leaving Cert Biology): Flashcards

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Pollination
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Definition of pollination

Transfer of pollen from anther to stigma of same species

Self-pollination meaning

Anther & carpel on same plant

Offspring from self-pollination

Weaker

Cross-pollination meaning

Anther & carpel on different plants

Offspring from cross-pollination

Stronger and healthier

2 methods of cross-pollination

Wind and animal (including insects)

Wind pollination: pollen traits

Huge amounts, small, light

Animal pollination: pollen traits

Smaller amounts, large, sticky

Wind pollination: petal features

Small, green, no scent, no nectar

Animal pollination: petal features

Large, coloured, scented, nectar

Wind pollination: anther position

Large, outside petals

Animal pollination: stigma traits

Smaller, rounded, inside petals

Examples of wind pollinated plants

Grasses, conifers, oak

Cause of hay fever

Reaction to pollen grains

Hay fever treatments

Antihistamines & decongestant drugs

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