Question

Retrogressive metamorphosis occurs in

• A. Hemichordata
• B. Cephalochordata
• C. Urochordata
• D. Vertebrata

Answer 1

The correct option is C Urochordata

Metamorphosis is a change from the juvenile to adult stage in which larval stage is quite different from the adult stage.
In retrogressive metamorphosis the larva possesses advanced characters which are lost during the development and the adult is either sedentary or degenerated with primitive characters.
Of the given options, only in urochordata, retrogressive metamorphosis is observed as the larval stage is more evolved as compared to adult form.