In which among the following animals, retrogressive metamorphosis is found?

Vertebrata

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Urochordata

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Invertebrates

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Chordates

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Solution

The correct option is D Urochordata
Retrogressive metamorphosis is the characteristics of Ascidians (Urochordates or tunicata). When an organism changes from a more advanced form to its primitive form, it is called retrogressive metamorphosis. In Ascidians, a progressive and active larva metamorphose into a primitive sedentary adult. So, the correct answer is option B.

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