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4 Cards in this Set
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- Back
Placental mammals |
Nourish their growing embryos through a complete placenta attached to the wall the uterus. They give birth to live young and have teats. |
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Marsupials |
Give birth to young at a very early (embroynic) stage. They have a pouch where the young spend time completing their development. |
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Monotremes |
They lay eggs through cloaca and secret milk through pore in their skin. |
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Features of birds |
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