Topic 9.4: Reproduction in Plants
Essential Idea: Reproduction in flowering plants is influenced by the biotic and abiotic environments.
At SHS, Topic 9.4 is taught in the following class unit(s):
Statements & Objectives:
9.4.U1 Flowering involves a change in gene expression in the shoot apex.
9.4.U2 The switch to flowering is a response to the length of light and dark periods in many plants.
9.4.U3 Success in plant reproduction depends on pollination, fertilization and seed dispersal.
9.4.U4 Most flowering plants use mutualistic relationships with pollinators in sexual reproduction.
9.4.A1 Methods used to induce short-day plants to flower out of season.
9.4.S1 Drawing internal structure of seeds.
9.4.S2 Drawing of half-views of animal-pollinated flowers.
9.4.S3 Design of experiments to test hypothesis about factors affecting germination.
9.4.NOS Paradigm shift-more than 85% of the world’s 250,000 species of flowering plant depend on pollinators for reproduction. This knowledge has led to protecting entire ecosystems rather than individual species.
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