Scientists divide mammals into three classes depending on how they deliver their young, and you'll want to celebrate them with mammal stickers. Monotreme mammals, like the platypus, lay eggs, but they feed their babies milk once the eggs hatch. Marsupial mammals, like the kangaroo, give birth to barely formed organisms that develop further in their mother’s pouch. Placental mammals, like giraffes, form inside the mother’s womb and are fed by the umbilical cord.
Scientists divide mammals into three classes depending on how they deliver their young, and you'll want to celebrate them with mammal stickers. Monotreme mammals, like the platypus, lay eggs, but they feed their babies milk once the eggs hatch. Marsupial mammals, like the kangaroo, give birth to barely formed organisms that develop further in their mother’s pouch. Placental mammals, like giraffes, form inside the mother’s womb and are fed by the umbilical cord.
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