Which of the following phylum lacks the ability of regeneration?
A
Protozoa
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B
Porifera
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C
Coelenterata
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D
Nemathelminthes
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Solution
The correct option is D Nemathelminthes
Nemathelminthes is a phylum of unsegmented, triploblastic, pseudocoelomic, cylindrical or thread-like worms which are covered by a body wall having cuticle and epidermis. They are commonly called threadworm or roundworm.
The members of the phylum Nemathelminthes lacks the ability of regeneration because they do not have stem cells required for regeneration.