Q20 of 525 Page 236

Which one is the most striking or (common) character of the vertebrates?

The characteristic features of vertebrate is presence of notochord.Notochord is a mesodermally derived rod-like structure that runs along back of the animal separating the nervous tissue from gut.

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18

Which of the following is not a criterion for classification of living organisms?

 19

Which is not an aquatic animal?

 21

Which among the following have scales?

(i) Amphibians


(ii) Pisces (iii) Reptiles (iv) Mammals

 22

Find out the false statement