The greatest ability of regeneration amongst the animals is found in
A
Ascaris
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B
Pheretima
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C
Hirudinia
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D
Planaria (Dugesia)
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Solution
The correct option is CPlanaria (Dugesia)
Regeneration is the capability of developing into a whole organism from a part of the body. Regeneration is well marked in the organisms of phylum Platyhelminthes, like Planaria. Ascaris belongs to phylum Nematoda and Pheretima and Hirudinia belong to phylum Annelida.
Planarians are non-parasitic flatworms. All their tissues, irrespective of from where the tissue was derived (from endoderm, mesoderm or ectoderm) display remarkable regenerative capacities.