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  • ICAR and TNAU E-Course Summarized

    Summarized Notes
  • The Gymnosperms are characterized by:

    Question: The Gymnosperms are characterized by:

    Options:

    Naked seeds
    Seeds with seed coat
    Seeds with wings
    Seeds inside fruits

    ✅Explanation:
    The defining characteristic of Gymnosperms is the presence of naked seeds. This means that their seeds are not enclosed within an ovary or a fruit, unlike the seeds of flowering plants (Angiosperms). Gymnosperm seeds develop on cones, where they lie exposed until they mature and are released.

    🔑Key Points: :
    -Gymnosperms are plants in which seeds are not enclosed by an ovary wall or seed coat, that is, seeds formed post-fertilization are naked.
    -In gymnosperms, the male and female gametophytes do not live separately as free-living organisms.
    -They continue to exist inside the sporangia on the sporophytes.
    -From the microsporangium, the pollen grain is released.
    -Pollen grains are carried through the air and encounter the opening of the ovules carried by megasporophylls.
    -In the ovules, the pollen tube containing the male gametes expands toward the archegonia and releases its contents close to the archegonia's mouth.
    -A zygote becomes an embryo after fertilization, and ovules become seeds. This crop of seeds is uncovered.

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