Go through the following characters - I. Heterodont and Thecodont (different types of teeth pres...

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Go through the following characters -
I. Heterodont and Thecodont (different types of teeth present in jaw)
II. Homiothermous (warm blooded)
III. Pulmonary respiration (respiration by lungs)
IV. Hairs
V. The most unique character is the presence of mammary glands
VI. Dioecious, internal fertilization mostly viviparous
All above characters are assigned to -
(a) Reptiles
(b) Mammals
(c)Aves
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