- Review pupils' understanding of the process of pollination in a flowering plant and what happens during fertilisation, prompting if necessary by showing pupils specimens of flowering plants and images of pollen and ovules,
eg photomicrographs or microscope slides.
- Ask pupils to suggest how a plant breeder could ensure that pollen from one particular flower was used to pollinate another flower, ensuring that no other pollen could be involved, and taking account of the fact that pollen and ovules may not ripen at the same time. Ask pupils to work in groups to produce a set of instructions for the process for use by a trainee breeder.
- Ask groups to share and evaluate each other's ideas. Provide pupils with an account of how a plant breeder ensures selective pollination.
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- describe pollination in terms of male and female cells
- identify problems to be overcome in selective pollination
- suggest how to ensure that a flower is pollinated by the selected pollen
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