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Chapter 38 - Chapter 38 Angiosperm Reproduction 1...

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Chapter 38 Angiosperm Reproduction 1) Pollination enables gametes to come together within a flower a) In angiosperms, the dominant sporophyte produces spores that develop into male gametophytes (pollen grains) and female gametophytes (embryo sac) 2) Flower Structure a) Flowers are the reproductive shoots of the angiosperm sporophyte b) There a 4 floral organs in a complete flower i) Sepals ii) Petals iii) Stamens iv) Carpels c) Incomplete flowers lack one or more of the floral organs 3) Reproductive Variations a) Incomplete flowers may lack either stamen or carpels i) Staminate flowers do not have carpels ii) Carpellate flowers do not have stamens b) Plants with flowers of both sexes are monoecious c) Plants that have flowers of one sex or the other are dioecious 4) Pollen: The Male Gamtophyte a) Each microsporangia contains diploid mocrosporocytes (microspore mother cells) b) Microsporocytes divide by meiosis to produce microspores c) Pollen grain becomes the mature male gametophyte 5)
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