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  4. The life cycle of some plants do not involve a free-living sporophyte and the dominant, photosynthetic phase is the free-living gametophyte. This type of life cycle is called

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Q. The life cycle of some plants do not involve a free-living sporophyte and the dominant, photosynthetic phase is the free-living gametophyte. This type of life cycle is called

NTA AbhyasNTA Abhyas 2020Plant Kingdom

Solution:

In plants mainly three types of life cycle are seen (a) Haplontic (b) Diplontic (c) Haplo-diplontic. Haplontic life cycle is seen in most algae (like Volvox and some species of Chlamydomonas) and fungi. In which dominant phase is haploid gametophyte which is free-living and photosynthetic. Its alternate phase is sporophyte which is short living and is dependent on gametophyte. In Kelp and seed bearing plants diplontic life cycle takes place. In bryophytes and pteridophytes haplo-diplontic life cycle takes place.