What is alternation of generation
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Answer:
Alternation of generation
Alternation of generations is a type of life cycle in which subsequent generations of plants alternate between diploid and haploid organisms.
Alternation of generations is common in plants, algae, and fungi. This can be compared to the sexual reproduction in animals where both haploid and diploid cells are found in every generation.
Plants alternate between the diploid sporophyte and haploid gametophyte, and between asexual and sexual reproduction. Therefore, the life cycle of plants is known as alternation of generations. The ability of the plants to reproduce sexually and asexually helps them to adapt to different environments.
The alternation of generations depends upon the type of the plant. In Bryophytes, the dominant generation is haploid and the gametophyte comprises the main plant. In tracheophytes, the dominant generation is diploid and the sporophyte comprises the main plant.
The plants’ life cycle in one of the two generations is dominant over the other. The plants in the dominant generation grow larger and live longer. The plants in the non-dominant generations are small and hardly visible. On the contrary, the dominant generations are seen in the form of ferns, trees or other plants.
The dominant generation in vascular plants is the sporophyte, while in the non-vascular plants is the gametophyte.
Explanation:
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Answer:
1. Alternation of generations is also known as metagenesis or heterogenesis.
2. It is the type of life cycle that occurs in plants, algae, and fungi.
3. In which subsequent generations of individuals alternate between haploid and diploid organisms.
4. It can be compared to sexual reproduction in animals where both haploid and diploid cells are found in every generation.
5. Alternation of generations has several distinct features, and these features can be slightly modified between species.
6. Plants alternate between the diploid sporophyte and haploid gametophyte, and between asexual and sexual reproduction.
7. Therefore, the life cycle of plants is known as the alternation of generations.