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  4. Which set of animals are included under protochordates?

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Q. Which set of animals are included under protochordates?

NTA AbhyasNTA Abhyas 2022

Solution:

Subphyla Urochordata and Cephalochordata are often referred to as protochordates and are exclusively marine. In Urochordata, the notochord is present only in larval tail, whereas in Cephalochordata, it extends from head to tail region and is persistent throughout their life.
Examples:
Urochordata: Ascidia, Salpa, Doliolum;
Cephalochordata: Branchiostoma (Amphioxus or Lancelet).