Quite simply, the egg-laying mammals are restricted to just the monotremes. Koalas are marsupials, not monotremes. The reproductive system of marsupials is made for giving live birth, not for laying eggs. The only egg-laying mammals are echidnas and platypuses.
because when the eggs hatch they dont dround and after they hatch they swim to mothers in the ocean
you dont
yes unless the eggs are eaten then no
They dont they have eggs that hatch inside the mothers body;it is decided they have live birth
No they dont, they lay eggs and have to hatch them the same as chickens do.
i dont know look on wikipedia 4 it :I
i dont think they even lay eggs yeah they the eggs out
No.
Yes, snakes hatch from eggs.
Bad eggs generally dont hatch. Somtimes they'll hatch into another bad egg, other times they'll hatch into a glitch pokemon.
No, rabitts are mammals which means that they give birth to their young just like humans do.
No,only monotremes hatch eggs.