Write a short note on Urochordates.

1.	Write a short note on Urochordates.
Answer» Distinguishing features of Tunicata or Urochordata: 1. Habitat: They are exclusively marine. 2. Body covering: Soft body is covered by ‘test’ or ‘tunic’ which is made up of tunicine. 3. Notochord: Notochord is present only in the tail of the larva and is lost during metamorphosis. Hence, the name Urochordata. 4. Respiration: Pharynx with many gill slits for respiration. 5. Circulation: Closed circulatory system is present. 6. Reproduction: Development is indirect, e. g. Herdmania, Salpa, Doliolum, Ascidia.

Answer»

Distinguishing features of Tunicata or Urochordata:

1. Habitat: They are exclusively marine.

2. Body covering: Soft body is covered by ‘test’ or ‘tunic’ which is made up of tunicine.

3. Notochord: Notochord is present only in the tail of the larva and is lost during metamorphosis. Hence, the name Urochordata.

4. Respiration: Pharynx with many gill slits for respiration.

5. Circulation: Closed circulatory system is present.

6. Reproduction: Development is indirect, e. g. Herdmania, Salpa, Doliolum, Ascidia.

Discussion