Bloomers: What are the Parts of a Flower? (page 2)

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Author: Janice VanCleave

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Most flowers have the same general structure. A complete flower contains a pistil, stamens, petals, and sepals, and an incomplete flower is missing one or more of these flower parts. Repeat the experiment twice, first preparing an incomplete flower by leaving off the petals, then preparing a second incomplete flower by leaving off the sepals and petals. Science Fair Hint: Fold 2 index cards in half to use as identification cards. Label one card Complete Flower and the other card Incomplete Flower. Display the two models of incomplete flowers and the model of the complete flower from the original experiment. Find out whether a flower can lack both male and female reproductive organs (stamens and pistil).

Show Time!

Angiosperms are flowering plants that have a vascular system. They are divided into two groups, monocotyledons or monocots and dicotyledons or dicots. (For more information about these two groups, see chapter 13, "Single.") These two groups have different numbers of flower parts, such as petals, sepals, and stamens. In monocots, these flower parts usually occur in multiples of three. In dicots, the parts usually occur in multiples of four or five. Observe flowers and identify types from the two angiosperm groups. Take photos, make drawings, or follow instructions from a crafts book on preserving flowers to prepare a display showing flowers of monocots and dicots.


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