NEET BIOLOGY

Detailed explanation-1: -Urochordates, like Herdmania have notochord and nerve cord present only in nerve stages. Body is covered by a test made up of tunicin. Notochord is present only in tail. Tadpole undergoes retrogressive metamorphosis and notochord and nerve cord is absent in adults, which is lost during metamorphosis.

Detailed explanation-2: -In Urochordata, notochord is found only in the tail of the larva and disappears in the adult.

Detailed explanation-3: -The name Urochordata is derived from the fact that the notochord is present in the tail (from the ancient Greek uron, tail).

Detailed explanation-4: -In Urochordata, the notochord is present only at the larval stage.

Detailed explanation-5: -(A) In Urochordata, the notochord is present only in the larval tail.