Question

why duck billed platypus is a connecting link between reptiles and mammals.?​

Answer 1

Answer:

Duck-billed platypus (Ornithorhynchus) is a connecting link between reptiles and mammals. It shows mammalian characters like mammary glands, hair, diaphragm, single aortic arch etc. It shows reptilian characters in having a large coracoid in pectoral girdle and in laying eggs with yolk and shell.

Answer 2

Answer:

The characteristic resembling reptiles is laying of eggs and the characteristics resembling mammals is presence of mammary glands.