Give the characteristic features of class Cephalochordata.

1.	Give the characteristic features of class Cephalochordata.
Answer» 1. Cephalochordates are also known as lancelets and are small fish-like animals that rarely exceed 5 cm in length. 2. Lancelets are exclusively marine and live partly buried in soft marine sediments. 3. Notochord extends throughout entire length of the body and persists throughout life. 4. Myotomes (muscle blocks) are present. 5. Post anal tail is present. 6. Circulatory system is closed type. Blood lacks pigment, e.g. Branchiostoma

Answer»

1. Cephalochordates are also known as lancelets and are small fish-like animals that rarely exceed 5 cm in length.

2. Lancelets are exclusively marine and live partly buried in soft marine sediments.

3. Notochord extends throughout entire length of the body and persists throughout life.

4. Myotomes (muscle blocks) are present.

5. Post anal tail is present.

6. Circulatory system is closed type. Blood lacks pigment, e.g. Branchiostoma

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