Insect- vs wind-pollinated flowers?
Reveal answer
Insect: big coloured petals, scent, nectar, sticky stigma inside. Wind: none, feathery stigma and anthers outside, lots of light pollen.
Key words: feathery · nectar
4(a) REPRODUCTION · RECALL
4.3 Insect-pollinated and wind-pollinated flowers
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What is pollination?
Reveal answer
Transfer of pollen from anther to stigma.
Key words: anther · stigma
Why do insect flowers make nectar?
Reveal answer
To attract insects that carry pollen.
Key words: attract
Why so much pollen in wind flowers?
Reveal answer
Random transfer → most lost → more chance one lands on a stigma.
Key words: random
Which flower part receives pollen?
Reveal answer
The stigma.
Key words: stigma
What is cross-pollination?
Reveal answer
Pollen moved to a flower on a different plant of the same species.
Key words: different
What is meant by the term pollination?
Reveal answer
Transfer of pollen from anther to stigma of a flower of the same species.
Key words: pollination
What is meant by the term anther?
Reveal answer
Part of a stamen that produces pollen.
Key words: anther
What is meant by the term stigma?
Reveal answer
Surface that receives compatible pollen.
Key words: stigma
What is meant by the term ovule?
Reveal answer
Structure in the ovary containing the female gamete nucleus.
Key words: ovule
Pollination syndromes: for Petals/scent/nectar, give the insect pollination and the wind pollination.
Reveal answer
Insect pollination: Prominent attractants. Wind pollination: Reduced or absent.
Key words: Petals/scent/nectar
Pollination syndromes: for Anthers, give the insect pollination and the wind pollination.
Reveal answer
Insect pollination: Firm and inside flower. Wind pollination: Exposed and dangling.
Key words: Anthers
Pollination syndromes: for Stigma, give the insect pollination and the wind pollination.
Reveal answer
Insect pollination: Sticky and inside. Wind pollination: Large, feathery and exposed.
Key words: Stigma
Pollination syndromes: for Pollen, give the insect pollination and the wind pollination.
Reveal answer
Insect pollination: Fewer, larger, sticky/spiky grains. Wind pollination: Many small, light, smooth grains.
Key words: Pollen
Pollination syndromes: for Function, give the insect pollination and the wind pollination.
Reveal answer
Insect pollination: Adheres to visiting animal. Wind pollination: Released and intercepted from air.
Key words: Function
True or false, and why? “Pollination is fertilisation.”
Reveal answer
False. Pollination transfers pollen; fertilisation later fuses gamete nuclei.
True or false, and why? “Wind-pollinated flowers have no adaptations.”
Reveal answer
False. They have specialised exposed anthers, feathery stigmas and light pollen.
True or false, and why? “All brightly coloured flowers are insect-pollinated.”
Reveal answer
False. Features provide evidence but pollination biology can be more varied.