Plant Responses
No description yet. This curated deck is ready for daily study.
Card preview (24)
Label a diagram of an insect-pollinated flower.
Label a diagram of a wind-pollinated flower.
What makes up the carpel?
The stigma + style + ovary — these are the female parts of the plant
How is the stigma adapted to allow insect pollination?
Sticky, and inside the flower, so pollen grains stick to it when an insect brushes past.
What is mean by the style in a plant?
Tube-shaped connection between the stigma and ovule that elevates the stigma to catch pollen.
What is meant by the ovary in a plant?
The structure which contains the ovules.
How is the nectary adapted to allow insect pollination?
Nectar is scented to attract insect pollinators.
What is meant by the sepal?
A leaf-shaped structure on the outermost part of the flower that protects the unopened flower.
How is the filament adapted to allow insect-pollination?
Slender stalk supporting the anther to make it accessible to insects.
What makes up the stamen?
Anther + filament — these are the male parts of the plant
How is the anther adapted to allow insect pollination?
Stiff nd firmly attached to the filaments of the flower to brush against insects. It also produces large quantities of pollen.
How is the petal adapted to insect pollination?
Large and brightly coloured to attract insects.
How is the anther adapted to wind pollination in a wind-pollinated flower?
Anthers that produce pollen are loosely attached to long filaments outside of the flower to easily release pollen via wind. They also produce large quantities of pollen to increase chances of pollination.
How is the stigma adapted to wind-pollination in a wind-pollinated flower?
Stigma is feathery and outside the flower to catch drifting pollen grains.
How is the filament adapted to wind-pollination in a wind-pollinated plant?
These are long, allowing the anther to hang outside so pollen can easily be caught by the wind.
How are pollen grains adapted to wind-pollination in a wind-pollinated plant?
Pollen grains are smooth and light to be carried easily by the wind.
How are pollen grains adapted to insect-pollination?
They are sticky and spiky to attach to insects.
What are 3 differences in the structure of insect and wind pollinated plants?
1) insect pollinated flower petals are large and brightly coloured, while in wind pollinated these are tiny and dull-coloured. 2) insect pollinated flowers contain nectar, but not wind pollinated plants 3) insect pollinated flowers’ anthers and stigmas are inside the flower, while wind pollinated flowers’ stigmas and anthers are more exposed.
What are the key steps that lead to seed and fruit formation?
• growth of the pollen tube • fertilisation
PRACTICAL: investigate the conditions needed for seed germination.
C - O - R - M - S -
How do germinating seeds obtain glucose before they can carry out photosynthesis?
By utilising food reserves
In which two ways can plants reproduce?
• sexually • asexually
PLANT ASEXUAL REPRODUCTION ( 3.7)
In which 4 ways can a plant be pollinated?
• by insects • by wind • self-pollinated • cross-pollinated