A) reptiles and birds
B) amphibians and reptiles
C) birds and mammals
D) reptiles and mammals
Correct Answer: D
Solution :
Tachyglossus aculeatus (= Echidna aculeatd) or spiny ant eater is a connecting link between reptiles and mammals. Its reptilian characters are presence of cloaca, lay eggs which are reptilian in structure and development, eggs contain enough yolk, and embryonic development similar to reptiles, while mammalian characters are presence of hairs, have mammary glands which produce milk and nourish children.
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