6 (e) Platypus and echidnas are only found in Australia and New Guinea. Australia and New Guinea are both islands. Platypus and echidnas are the only mammals to lay eggs. All other mammals evolved to give birth to live young. Suggest reasons why platypus and echidnas evolved differently to other mammals. ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [2] [Total: 8]
Š OCR 2013