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Sexual reproduction in plants
Recognize and illustrate the following components of an insect-pollinated flower in diagrams: sepals, petals, stamens, filaments, anthers, carpels, style, stigma, ovary, and ovules.
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90 min
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CambridgeIGCSEBiologyReproduction
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Sexual reproduction in plants outcomes12 objectives
- Recognize and illustrate the following components of an insect-pollinated flower in diagrams: sepals, petals, stamens, filaments, anthers, carpels, style, stigma, ovary, and ovules.
- Explain the roles of the structures mentioned in section 16.3.1.
- Recognize and explain the anthers and stigmas found in wind-pollinated flowers using diagrams and images.
- Differentiate between the pollen grains of insect-pollinated flowers and those of wind-pollinated flowers.
- Explain pollination as the process of transferring pollen grains from an anther to a stigma.
- Acknowledge that fertilization happens when a pollen nucleus merges with a nucleus in an ovule.
- Explain the structural features that adapt insect-pollinated and wind-pollinated flowers for their respective pollination methods.
- Examine and explain the environmental factors that influence seed germination, focusing on the need for water, oxygen, and appropriate temperature.
- Explain self-pollination as the transfer of pollen grains from the anther to the stigma of the same flower or another flower on the same plant.
- Explain cross-pollination as the transfer of pollen grains from the anther of one flower to the stigma of a flower on a different plant of the same species.
- Discuss how self-pollination and cross-pollination can impact a population regarding variation, adaptability to environmental changes, and dependence on pollinators.
- Describe the development of the pollen tube and its penetration into the ovule, leading to fertilization (details on endosperm production and development are not necessary).
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