Subphylum Urochordata Protochordata


 
 
Concept Explanation
 

Subphylum Urochordata Protochordata

Most urochordates are sessile marine animals. The body is unsegmented and covered by a cellulose-like substance called tunicin.

  • Though gill slits are present, the adults lack other chordate characteristics.

  • The notochord occurs only in the tail of the larva.

  • The adult lacks it. It also lacks a tail and a nerve cord, though the larva has these features.

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    Sample Questions
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    Question : 1

    Ascidian are the members of ________________ phylum.

    Right Option : A
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    Question : 2

    Retrogressive metamorphosis is found in _________________

    Right Option : C
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    Question : 3

    The change in the body of organism in which the adult is more primitive than the larva is called as the _________________.

    Right Option : C
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