echidna and platypus lay eggs then why they are considered as mammals
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Echidna and platypus belong to the order Monotremata of Mammalia. These are only egg laying mammals. Monotremes possess mammalian features. In addition to these features, they also possess some of the reptilian features. These are considered as primitive mammals with both mammalian and reptilian features.
Like reptiles, they lay eggs as reptiles. They also have cloaca, a single opening to pass out, urine, faeces, sperms or eggs. This is a reptilian feature.
Like reptiles, they lay eggs as reptiles. They also have cloaca, a single opening to pass out, urine, faeces, sperms or eggs. This is a reptilian feature.
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