. Which among the following have an open circulatory system
(i) Arthropoda
(ii) Mollusca
(iii) Annelida
(iv) Coelenterata
(a) (i) and (ii)
(b) (iii) and (iv)
(c) (i) and (iii)
(d) (ii) and (iv)
Best Answer
Answer: is (a) (i) and (ii)
Annelida and Coelenterata have closed circulatory system whereas Arthropods and Mollusca have an open circulatory system.
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