Q.:- What are the differences between animals belonging to the Aves group and those in the mammalian group?
Differences between in the mammalian group:-
|1.||The body is covered with feathers.||Their body is covered by skin with hair.|
|2.||The forelimbs are modified for flight.||The forelimbs are modified for climbing or for some other purposes.|
|3.||Mammary glands are absent.||Mammary glands are present. These produce milk to feed their young ones.|
|4.||Bones are light and hollow.||Bones are solid, hard and filled with bone marrow.|
|5.||They lay eggs (oviparous).||They produce young ones (viviparous). However, platypus and echidna lay eggs and some like Kangaroos give birth to very poorly developed young ones.|
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