Biology 1225 Chapter Notes - Chapter 28: Multiple Fruit, Coleoptile, Starch
26 Mar 2018
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28. 2 sexual reproduction: flowers are the specialized reproductive structure of angiosperms, the form/composition of flowers vary across species, 1. A flower"s parts are modified leaves that develop from a thickened region of stem called a receptacle. A typical flower has 4 spirals/rings (whorls) od modified leaves flower: the outermost whorl is the calyx, a ring of leaf-like sepals, 3. The flower"s innermost whorl consists of modified leaves folded and fused: a typical anther has 4 pollen sacs filled with pollen grains, a stamen consists of a thin filament with an anther at the tip, 4. Bees have a keen sense of smell, and they can see uv light: ex. flowers pollinated by birds are typically bright red and unscented, In typical monocots: nutrient reserves stay in endosperm as the seed matures. In typical eudicots: embryos transfer nutrients in endosperm to cotyledons as the seed matures: most of the nutrients in a mature eudicot seed are stored in the.
