Q18 of 525 Page 236

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

The criteria which are used for classification of organisms are presence or absence well defined nucleus and membrane-bound cell organelles (cell structure), Body design of the organism and the ability to produce one’s own food.

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16

In which group of animals, coelom is filled with blood?

 17

Which among the following have open circulatory system?

(i) Arthropoda


(ii) Mollusca


(iii) Annelida


(iv) Coelenterata

 19

Which is not an aquatic animal?

 20

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