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In Bryophytes, the dominant phase in the...

In Bryophytes, the dominant phase in the life cycle is the the gametophyte plant. However in pteridophytes the main plant body is a sporophyte. How can we easily differentiate between the the sporophytes in bryophytes and pteridophytes.

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How can we differentiate Pteridophytes and Bryophytes.

heterospory i.e formation of two types of spores- microspores and megaspoores is characteristic features in the life cycle of a few members of pteridophytes and all spermatophytes. do you think heterospory has some evolutionary significance in plant Kingdom.

Knowledge Check

  • Read tlie following five statements (a to e) and select the option with all correct statements. (a) Mosses and Lichens are the first organisms to colonise a bare rock. (b) Selaginella is a homosporous pteridophyte. (c) Coralloid roots in Cycas have VAM. (d) Main plant body in bryophytes is gametophytic, whereas in pteridophytes it is sporophytic. (e) In gymnosperms, male and female gametophytes are present within sporangia located on sporophyte.

    A
    a, d and e
    B
    b, c and e
    C
    a, c and d
    D
    b, c and d

  • Assertion: The haploid plant body (gametophyte) produces gametes by mitosis. Reason: Diploid sporophytic plant body produces spores by meiosis.

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of the assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • The type of life-cycle in which there is no free-living sporophyte and the dominant, photosynthetic phase in such plants is the free-living gametophyte. We are talking about,

    A
    Haplontic life cycle shown in Volvox and some species of Chlamydomonas
    B
    Diplontic life cycle as shown in seed-bearing plants
    C
    Haplo-diplontic life cycle as shown in bryophytes and pteridophytes
    D
    Haplo-diplontic life cycle as shown in Kelps

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    Explore conceptually related problems

    The following is a list of Plants. Riccia, Chlorella, Salaginella, Adiantum, Chalamydomas, Sugarcane, Funaria, Gnetum, Ficus, Cycas. Categories this plans into algae, bryophytes, pteridophytes, Gymnosperms and Angiosperms.

    Assertion: Plants lead to the formation of different plant bodies—haploid gametophyte and diploid sporophyte. Reason: In plants, both haploid and diploid cells can divide by mitosis.

    The diploid sporophyte is represented by a dominant, independent, photosynthetic, vascular plant body. It alternates with multicellular, saprophytic/autotrophic, independent but short-lived haploid gametophyte. This type of pattern is exhibited by:

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