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1. | (i) Wilted lettuce leaves if kept in cold water become crisp. | | | | |
2. | (ii) It is advisable not to sleep under a tree at night. | | | | |
3. | (iii) Urine is slightly thicker in summer than in winter. | | | | |
4. | (iv) Erythrocytes are biconcave discs and lack mitochondria. | | | | |
5. | (v) Noise is regarded as unwanted sound. | | | | |
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