10. Flowers and pollination

10. Flowers and pollination - 2/12/2009 1 Flowers are...

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2/12/2009 1 1 Flowers are bisexual structures adapted for pollination by animals Pollen is produced in the stamens Ovules are contained in chambers called pistils Petals are colored and/or produce nectar and fragrance to attract animals to the flowers After pollination, the pistil becomes the fruit and the ovules become seeds with stored food and embryos within them 2 With male and female flower parts close together in each flower, animals that feed in flowers will carry pollen from one flower to another, depositing it on the stigmas when they arrive 3 Flowering plants undergo double fertilization One sperm unites with the egg, the other with the two polar nuclei to make endosperm • The endosperm is triploid and rapidly triploid and rapidly multiplies to form a rich store of nutrients for the developing embryo 4 How are flowers specialized for pollination by different kinds of insects (as well as by vertebrates)? Produce abundant pollen
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This note was uploaded on 02/10/2010 for the course BSC 2010 taught by Professor Essig during the Spring '10 term at University of Southern Maine.

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10. Flowers and pollination - 2/12/2009 1 Flowers are...

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