Question
Mammalia and Aves
| Mammalia | Aves | ||
| (i) | Mammary glands are present. | (i) | Mammary glands are absent. |
| (ii) | Mammals are mostly adapted for terrestrial life. | (ii) | Aves are com- pletely adapted for aerial life. |
| (iii) | Limbs are used for walking and running. | (iii) | Forelimbs are modified into wings for flying |
| (iv) | Body is covered with hair or fur. | (iv) | Body is covered with feathers. |
| (v) | They are vivipa- rous. | (v) | They are ovipa- rous. |
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