Sexual reproduction in plants

What the syllabus asks of you

• Identify in diagrams and images and draw the following parts of an insect-pollinated flower: sepals, petals, stamens, filaments, anthers, carpels, style, stigma, ovary and ovules
• State the functions of the structures listed in 16.3.1
• Identify in diagrams and images and describe the anthers and stigmas of a wind-pollinated flower
• Distinguish between the pollen grains of insect-pollinated and wind-pollinated flowers
• Describe pollination as the transfer of pollen grains from an anther to a stigma 9 Describe self-pollination as the transfer of pollen grains from the anther of a flower to the stigma of the same flower or a different flower on the same plant 10 Describe cross-pollination as the transfer of pollen grains from the anther of a flower to the stigma of a flower on a different plant of the same species 11 Discuss the potential effects of self-pollination and cross-pollination on a population, in terms of variation, capacity to respond to changes in the environment and reliance on pollinators continued Core Supplement
• State that fertilisation occurs when a pollen 12 Describe the growth of the pollen tube and nucleus fuses with a nucleus in an ovule its entry into the ovule followed by fertilisation
• Describe the structural adaptations of (details of production of endosperm and insect-pollinated and wind-pollinated flowers development are not required)
• Investigate and describe the environmental conditions that affect germination of seeds, limited to the requirement for: water, oxygen and a suitable temperature