Question

Gametophyte is a dominant phase in the life cycle of a bryophyte. Explain

Answer 1

The gametophyte, during fertilization, swims to the female reproductive organs to complete their life cycle by sexual reproduction.And so , they are also called the amphibians of the plant kingdom. As allthough living on land, they require water for fertilization.Therefore, the gametophte, is oviously a dominant phase in the life cycle of a bryophyte.As without them the life cycle is not possible.

Answer 2

Answer:

Explanation:

---->In bryophytes, alternation in the generation is found i.e. both gametophytic (haploid) and sporophytic (diploid) generations are present. However, the dominant phase is represented by the gametophytic plant. The gametophyte is an independent, photosynthetic, thalloid phase. Antheridia and archegonia are formed on the gametophytes. These organs are multicellular. These organs bear the respective gametes, viz. male and female. The antheridium produces biflagellated antherozoids. The archegonium is flask-shaped. It produces a single egg. Transfer of antherozoids to the archegonium take place through the water. Flagella in the antherozoids facilitate motility. The zygote is formed after fertilization. But the zygote does not undergo meiosis immediately after fertilization. It develops into a multicellular body called the sporophyte.

--->The sporophyte in bryophytes is much smaller and is not independent but attached to the gametophyte. It gets nutrition from the gametophyte. It is clear that the gametophyte is the dominant phase in the life cycle of a bryophyte in every aspect. The gametophyte is independent and photosynthetic. It is much larger in size compared to the sporophyte. On the other hand, the sporophyte is not free-living but remains attached to the gametophyte so that it can get nutrition.

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