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The change of form which one animal species undergoes in a series of successively produced individuals, extending from the one developed from the ovum to the final perfected individual. Hence, metagenesis involves the production of sexual individuals by nonsexual means, either directly or through intervening sexless generations. Opposed to monogenesis. See Alternate generation, under Generation., Alternation of sexual and asexual or gemmiparous generations; -- in distinction from heterogamy.
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What are the differences between metagenesis and metamorposis?
Metagenesis is the phenomenon by which the organism exhibits alternation of generation.For eg :cnidarians especially obelia shows metagenesis where the polyp form (sessile and cylindrical structure) produce medusae (free swimming and umbrella shaped structure) asexually and medusae produce polyp sexually. But in metamorphosis, the organism undergoes several stages which are distinct from that of the adults and these distinct structures undergo abrupt changes in their body structures and internal organs to form the matured adult one. eg: frog,butterfly.
What is metagenesis in obelia?
Metagenesis in Obelia is a reproductive strategy in which both asexual and sexual phases occur in the life cycle. It involves alternating generations of polyps (asexual stage) and medusae (sexual stage) in which both forms are capable of reproducing. This allows for genetic diversity and the production of new colonies through sexual reproduction.
Which kingdom contains organisms that have a saprophyte and gametophyte stage?
Many algae contain organisms that have a sporophyte and a gametophyte stage. This is called metagenesis of alternation of generations and is a characteristic of Cladophora.
What is metagenesis in coelentrates?
Metagenesis, also known as alternation of generations, is a reproductive phenomenon in cnidarians where individuals alternate between a polyp and medusa form throughout their life cycle. The polyp form is a sessile, cylindrical structure that reproduces asexually, while the medusa form is a free-swimming, bell-shaped structure that reproduces sexually. This alternating life cycle allows for genetic diversity and adaptation to different environmental conditions.
What is an alternate generation?
An alternate generation is each of the two forms of an organism whose lifestyle involves alternation of generations - also known as metagenesis - the production of sexual and asexual organisms in alternate generations.
What is the mode of reproduction of medusae?
Medusa is a stage in life cycle of Cnidarians eg. Obelia in which medusae are produced by budding in blastostyl.Medusa possess sex organs i.e. testes and ovaries which produce gametes i.e. sperms and eggs which fuse to form zygote which develops in second stage of life cycle called a Polyp . Possession of two alternating stage in life cycle of Cnidarians is called Metagenesis .
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Full form of paramjeet?
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What is the meaning of word what?
'MEANING' in other words can be the 'vocabulary' of a word or the 'essence' of the word as to what the word precisely means. OR meaning is the meaning of meaning what you just said meaning
What word means the meaning of words?
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What is the meaning for in?
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What is the meaning of bonding energy in solid?
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