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DIVERSITY IN LIVING ORGANISMS
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पक्षी वर्ग और स्तनपायी वर्ग के जंतुआं में क्या अंतर है ?
Option A
Option B
Option C
Option D
Solution
| Aves | Mammals |
| Most birds have feathers and they possess a beak. | They do not have feathers and the beak is also absent. |
| They lay eggs. Hence, they are oviparous. | Some of them lay eggs and some give birth to young ones. Hence, they are both oviparous and viviparous. |
Std 9
Science
