Mammals are characterized by the following features except:
A
Presence of mammary glands
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B
Presence of external ears or pinnae
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C
Cold blooded nature
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D
Mostly viviparous
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Solution
The correct option is C Cold blooded nature Mammals belong to the class Mammalia, which is in the phylum Chordata of the kingdom Animalia. They are characterized by the presence of external hair and mammary glands. They have external ears or pinnae and are warm-blooded animals. They are viviparous and show extensive parental care.