| 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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| Column-$I$ (Plant Part) | Column-$II$ (Gas Exchange Structure) |
|---|---|
| $P$. Leaves and young stems | $I$. Lenticels |
| $Q$. Woody stems | $II$. Stomata |
| $R$. Roots | $III$. Root hairs |
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