Question

Explain the alternation of generation in bryophyte?

Answer 1

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Answer 2

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Explain the alternation of generation in bryophyte?

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During the life cycle of any sexually reproducing plant, there is alternation of generation between gamate producing haploid gametophyte and spore producing diploid sporophyte.

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• The life cycle of moss represent two distinct Generation :- Gametophytic and the Sporophytic.
• Moss plant is Gametophyte.
• Spore is the beginning of the gametophytic eneration. It develops into protenema which gives rise to male and female gameto phytes.
• Gametophyte(haploid) consists of green thallus having archegoniophores and antheridiophores which bear sex organs and the gametes are produced in them either in monoecious or dioecious plants.
• Zygote is formed after the fertilization (syngamy) of male and female gamete with the help of water.
• Repeated divisions of the zygote give rise to the embryo (2n) Which soon develops into Sporophyte.
• The sporophyte of moss gets differentiated into Three parts - Foot,Seta and Capsule. Inside the capsule Single celled spores are preduced.
• After the dehiscences,they begin to germinate and give rise to the protenema to start the cycle again.

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