Write short notes in 150 words:
Metagenesis
Metagenesis, also known as alternation of generations, refers to a fascinating biological phenomenon where an organism alternates between two distinct reproductive phases—one sexual and one asexual—within its life cycle. Unlike simple changes in reproductive modes, this process involves the formation of entirely different morphological stages that function in contrasting ways. A well-studied example occurs in cnidarians such as jellyfish (Aurelia). In this case, the sessile polyp stage reproduces asexually, producing tiny medusae through budding. These medusae grow into free-swimming adults that reproduce sexually, releasing gametes into the water. Fertilization leads to the development of a larva, which eventually settles and transforms into a polyp, thereby restarting the cycle. This alternation is ecologically advantageous, as it allows the species to exploit both benthic and pelagic habitats while combining the benefits of rapid clonal multiplication with the genetic variation generated by sexual reproduction, ensuring better adaptability and survival.
Answered By:
Similar Questions
Write short notes in 150 words:
Book lungsWrite short notes in 150 words:
PaedomorphosisWrite short notes in 150 words:
Torsion and detorsion in gastropodsWrite short notes in 150 words:
Draw a well-labelled diagram of human eye and write its functions.Give an illustrated account of reproduction in sponges.
Describe the general features, distribution and social organization in termites.
Describe the comparative anatomy of digestive system in vertebrates.
Describe the different stages of life cycle of Pheretima with the help of suitable diagrams.
Discuss the various modes of nutrition in protozoa.
Give an illustrated account of skull types in reptiles.
Important Questions from Miscellaneous
Write a note in 150 words
Mendelian and non-Mendelian traits.Write a note in 150 words
Theoretical significance of Purum kinship-system.Write a note in 150 words
Smell as a signal among non-human primates.Write a note in 150 words
Osteodontokeratik culture and its makers.Discuss the Miocene hominoid remains and their significance in evolution.
