Write a short note on Urochordates.

Question

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Answer

Distinguishing features of Tunicata or Urochordata:

Habitat: They are exclusively marine.
Body covering: Soft body is covered by ‘test’ or ‘tunic’ which is made up of tunicine.
Notochord: Notochord is present only in the tail of the larva and is lost during metamorphosis. Hence, the name Urochordata.
Respiration: Pharynx with many gill slits for respiration.
Circulation: Closed circulatory system is present.
Reproduction: Development is indirect, e. g. Herdmania, Salpa, Doliolum, Ascidia.

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