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Question

Protochordata marks the evolution of a new type in the body structure. How? 



A

By presence of notochord

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B

By separating nervous tissue from the gut

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C

By developing a circulatory system

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D

None of the above.

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Solution

The correct option is A

By presence of notochord


Protochordates are the first animal to show the presence of notochord at some stage of life. While the notochord does separate the nervous tissue from the gut, the presence of notochord is far more significant in evolutionary studies. 


Biology

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