Protochordates mark the evolution of a new type of body structure. How?

By presence of notochord

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By separating nervous tissue from the gut

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By developing a circulatory system

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None of the above

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Solution

The correct option is A By presence of notochord
Protochordates are the first animals 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.

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Question 18
Which one of the following feature is not a characteristic of protochordata?

(a) Presence of notochord
(b) Bilateral symmetry and coelom
(c) Jointed legs
(d) Presence of circulatory system

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Protochordates mark the evolution of a new type of body structure. How?

The correct option is A By presence of notochordProtochordates are the first animals 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.

The correct option is A By presence of notochord
Protochordates are the first animals 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.