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Read the following statements and find out the correct statement.

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Notochord persists throughout life in Ascidia.

Branchiostoma belongs to phylum Cephalochordata.

All chordates are vertebrates but all vertebrates are not chordates.

Urochordata and Cephalochordata are exclusively marine

answer is D.

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Detailed Solution

Subphyla Urochordata and Cephalochordata are often referred to as protochordates and are exclusively marine.

All vertebrates are chordates but all chordates are not vertebrates.

Branchiostoma (Amphioxus or Lancelet) belongs to sub-phylum Cephalochordata.

In Ascidia (Urochordata), notochord is present only in larval tail.

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