How are mammals different from other vertebrates?
| August 4, 2021 | education
Feeding cubs with milk.
This is the only and unique difference that exists between mammals and other animals. Not all mammals are viviparous, for example, the echidna and the platypus lay eggs. In addition, viviparity is also characteristic of some lizards, snakes and fish (for example, sharks). Birds and crocodiles, which are reptiles, also have a four-chambered heart. Besides mammals, warm-bloodedness is also characteristic of all birds.
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