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Retrogressive Metamorphosis is in
Option: 1
Cephalochordates
Option: 2
Urochordates
Option: 3
Agnatha
Option: 4
Gnathostomata
Answers (1)
Regression metamorphosis refers to degenerative changes in which active larvae metamorphose into sessile adults. In Urochordata, the notochord is present only in the larval tail. The tail and nervous system are reduced in adults because adults are sedentary. Common examples of Urochordata are Ascidia, Salpa, Doliolum. Branchiostoma is a cephalochord and Brananoglossus is a hemichordoma.
So the correct answer is "Herdmania (Urochordata)" Option 2 is correct.
View full answer
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