None - because there are two types of mammals which lay eggs. Monotremata is the order which contains the echidna and the platypus, both of which are egg-laying mammals. Monotremes is the order of mammals that lay eggs rather than giving live birth.
Mammals don't lay eggs. The only mammal that lays eggs is a platypus, and they have leathery feeling eggs, but still a shell.
Nothing can be "born" from an egg: it must be hatched. The order of mammals that lays eggs is Monotremata, or the monotremes. Platypus and Echidnas are the only monotremes, or mammals that lay eggs.
It lays its young in eggs.
Mammals are live birthers - they don't lay eggs.
warms is spelled worms and yes they lays eggs they are not mammals so they lay eggs
mammalAnimals that don't lay eggs are called Mammals, as they give live birth and have hairs. But, as Mother Nature can be contrary, the echidna and the platypus, though mammals, lay eggs!
There isn't one... kittens are mammals, thus, they don't lay eggs.
Mountain Lions are mammals, they do not lay eggs but give birth to live young.
No, they are marine animals, including starfish. An echidna is a mammal that lays eggs.
The echidna is an animal which lays eggs. The echidna is covered in spines. Like platypuses, echidnas are monotremes, or egg-laying mammals.
A sea turtle is not a mammal because it lays eggs