Monday, 9 July 2012

ADAPTATIONS FOR TYPES OF POLLINATION


Adaptations  to Insect and Wind Pollination
Adaptations of Insect Pollinated Flowers
  • Attract Pollinators: brightly coloured petals, petal shape, food reward – pollen and/or nectar, fragrance – volatile chemicals released into the air.
  • Pollen Collection by Insect: sticky pollen – stays in contact with anther until insect arrives.
  • Pollen Capture By Flower: sticky stigmas so pollen from insect will transfer to them.
Adaptations of Wind Pollinated Flowers
Pollen Collection by Wind: smooth – easily removed from anther, small pollen easily transported by the wind.
Pollen Capture by Flower: stigmas large and feathery – greater surface area to intercept pollen, stigmas outside the flower
Massive Pollen Production: compensate for the excessive losses.
Note:
  • An adaptation is a feature (behaviour or modified structure) which fits the organism better to carry out a particular function.
  • Ideally name or describe the feature and then give its advantage.
The absence of a feature is not an adaptation.

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