| 1. | Individual plants are either male producing microspores or female producing megaspores.
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| 2. | Curiously, microspores tend to adhere in clumps called massulae.
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| 3. | These support the development of microspores into mature pollen grains.
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| 4. | Microspores are haploid, and are produced from diploid microsporocytes by meiosis.
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| 5. | These plants have two spore types, megaspores and microspores.
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| 6. | These sets of sporogenous cells eventually develop into diploid microspore mother cells.
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| 7. | Microspores appear brown, each 26-31 ?m across.
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| 8. | The secondary spores may also go on to produce many smaller microspores.
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| 9. | Microspores are brown, up to 25 ?m in diameter.
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| 10. | In flowering plants, the anthers of the flower produce microspores by meiosis.
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