Which among the following have open circulatory system?

(i) Arthropoda

(ii) Mollusca

(iii) Annelida

(iv) Coelenterata

15

Elephantiasis is caused by

16

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

18

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

19

Which is not an aquatic animal?