Which of the following characteristics is generally not shared by birds and mammals?

A backbone and internal skeleton

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Breathing from lungs

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Viviparity

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Warm blooded nature

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Solution

The correct option is A Viviparity
Birds are oviparous as they lay eggs whereas mammals are generally viviparous. The only egg laying mammals are Platypus and Echidna.
Thus the correct answer is option C.

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Similar questions

Birds and mammals share one of the following characteristics as a common feature.

(a) Pigmented skin

(b) Pneumatic bones

(d) Warm blooded body

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