Is a platypus crossed by a rat and a duck?

Answer:
No. The platypus is not produced by crossing any animals. They were in Australia long before white man came and started degrading the environment and nature.
Platypuses are monotremes - egg-laying mammals - and not at all related to rats (placental mammals) or ducks (birds).
First answer by On the Wallaby. Last edit by On the Wallaby. Contributor trust: 2779 [recommend contributor recommended]. Question popularity: 42 [recommend question].