Multiple choice questions III — task. Science CBSE, Class 9.

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1. Which among the following is exclusively marine?

Pisces
Mollusca
Echinodermata
Porifera

2. Which among the following have open circulatory system?

(i) Arthropoda
(ii) Mollusca
(iii) Annelida
(iv) Coelenterata

(i) and (ii)
(ii) and (iv)
(i) and (iii)
(iii) and (iv

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