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Characterstic Features of Urochordata MCQ - Practice Questions with Answers

Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET

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Select the animal that exhibits retrogressive metamorphosis 

Concepts Covered - 1

Sub Phylum Urochordata - Characteristics Features
  • These animals are also called tunicates because of the presence of cellulose-like carbohydrate material called tunic that covers the outer body surface of these animals
  • They possess notochord only during the larval stage. The notochord at this stage is confined to the tail region only
  • The adult tunicates have only one feature of chordates, i.e., pharyngeal gill slits. The notochord, nerve cord and post-anal tail disappears in adults
  • They are hermaphroditic animals. The larvae hatch from the eggs inside the body of adult tunicate
  • They show retrogressive metamorphosis
  • Most of the Urochordates are sessile
  • They feed on plankton and detritus
  • Examples : Ascidia,Herdmania, Doliolum and Salpa
  • The following figure shows the comparative diagrams of larval and adult tunicate : 

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Sub Phylum Urochordata - Characteristics Features

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