| Column $I$ (Animals) | Column $II$ (Respiratory organs / surface) |
| $1$. Spider | $a$. Internal gills |
| $2$. Coelenterates | $b$. Book lungs |
| $3$. Frog | $c$. Plasma membrane |
| $4$. Fishes | $d$. Lungs |
| $e$. External gills |
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| Column-$I$ (Invertebrates) | Column-$II$ (Respiratory Organs) |
|---|---|
| $P$. Sponges,Coelenterates,Flatworms | $I$. Gills |
| $Q$. Earthworms | $II$. Simple diffusion through body surface |
| $R$. Insects | $III$. Vascularized bags (Lungs) |
| $S$. Aquatic arthropods and molluscs | $IV$. Tracheal tubes |
| $T$. Terrestrial arthropods and molluscs | $V$. Moist cuticle |
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