Quest

Diversity in Living Organisms

Duckbilled platypus and echidna are

(1) Reptiles 
(2) Eutherian mammals
(3) Egg-laying mammals 
(4) Young one producing animals




Duckbilled platypus and echidna lay eggs but are cat egerized as mammals because t hey have mammary glands to nourish their young ones with milk.

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