The animal group,where the adults are degener | vedclass

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(B) The correct answer is $B$. Tunicates (Urochordates),such as $Herdmania$,exhibit a phenomenon known as retrogressive metamorphosis. In this process

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Tunicates

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(B) The correct answer is $B$. Tunicates (Urochordates),such as $Herdmania$,exhibit a phenomenon known as retrogressive metamorphosis. In this process,the free-swimming larva possesses a well-developed notochord and a dorsal nerve cord. However,during metamorphosis into the adult stage,these chordate characteristics degenerate,and the adult becomes a sessile,sac-like organism.

The animal group,where the adults are degenerated but larvae are well developed,is

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