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| Column $-I$ | Column $-II$ |
| $(A)$ Cartilaginous fishes | $(i)$ Cycloid scales |
| $(B)$ Bony fishes | $(ii)$ Epidermal scales |
| $(C)$ Reptiles | $(iii)$ Placoid scales |
| Column-$I$ | Column-$II$ |
|---|---|
| $(a)$ Gregarious pest | $(i)$ Asterias |
| $(b)$ Radial symmetry in adults and bilateral symmetry in larvae | $(ii)$ Scorpion |
| $(c)$ Book lungs | $(iii)$ Ctenoplana |
| $(d)$ Bioluminescence | $(iv)$ Locusta |
| Column $X$ | Column $Y$ |
| $(1)$ Green gland | $(P)$ Mollusca |
| $(2)$ Digestive tract with digestive glands | $(Q)$ Arthropoda |
| $(3)$ Straight or coiled alimentary canal | $(R)$ Hemichordata |
| $(4)$ Straight or $U$-shaped digestive tract | $(S)$ Echinodermata |
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