| List-$I$ | List-$II$ |
| $(a)$ Metamerism | $(i)$ Coelenterata |
| $(b)$ Canal system | $(ii)$ Ctenophora |
| $(c)$ Comb plates | $(iii)$ Annelida |
| $(d)$ Cnidoblasts | $(iv)$ Porifera |
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| Column-$I$ | Column-$II$ |
| $(a)$ Amphibia | $(1)$ Air bladder |
| $(b)$ Mammalia | $(2)$ Cartilaginous notochord |
| $(c)$ Chondrichthyes | $(3)$ Mammary gland |
| $(d)$ Osteichthyes | $(4)$ Pneumatic bones |
| $(e)$ Cyclostomata | $(5)$ Dual habitat |
| $(f)$ Aves | $(6)$ Jawless,circular,sucking mouth |
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