Question: The Gymnosperms are characterized by:
Options:
Naked seeds
Seeds with seed coat
Seeds with wings
Seeds inside fruits
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.