Which of the following are referred to as non | vedclass

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(A) The phylum Chordata is divided into two main groups: Protochordata (or Acraniata) and Craniata (or Vertebrata).Protochordates are non-vertebrate c

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Ciona,Ascidia,Amphioxus

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(A) The phylum Chordata is divided into two main groups: Protochordata (or Acraniata) and Craniata (or Vertebrata).Protochordates are non-vertebrate chordates because they lack a true vertebral column. They include two sub-phyla: Urochordata (e.g.,Ciona,Ascidia) and Cephalochordata (e.g.,Branchiostoma,also known as Amphioxus).Therefore,the group containing Ciona,Ascidia,and Amphioxus represents non-vertebrate chordates.

$(1)$ Notochord present only in larval stage.	$(a)$ Chordata
$(2)$ Notochord present throughout life.	$(b)$ Vertebrata
$(3)$ Notochord is replaced by vertebral column.	$(c)$ Cephalochordata
$(4)$ Notochord is mesodermal in origin.	$(d)$ Urochordata

Which of the following are referred to as non-vertebrate chordates?

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