What are the differences between animals belonging to the $Aves$ group and those in the $Mammalia$ group?
(N/A)
| $Aves$ | $Mammalia$ |
|---|---|
| $Aves$ possess feathers and a beak. | $Mammals$ do not have feathers and lack a beak. |
| They are oviparous (egg-laying). | They are mostly viviparous (give birth to young),though some are oviparous. |
| They have pneumatic (hollow) bones to aid in flight. | They possess mammary glands to nourish their young. |
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