Q7 of 57 Page 48

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

In arthropods, the open circulatory system is present and so the coelomic cavity is filled with blood.

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5

Which among the following is exclusively marine?

 6

Which among the following have open circulatory system?

(i) Arthropoda


(ii) Mollusca


(iii) Annelida


(iv) Coelenterata

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Elephantiasis is caused by

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