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How do tadpoles and birds develop and get born without a placenta?
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How do tadpoles and birds develop and get born without a placenta?
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Oct 6, 2016
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How do tadpoles and birds develop and get born without a placenta?
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Rurouni
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They develop by feeding from the yolk of the egg that the frog has laid and that is equal to a placenta.
Keul
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Oct 12, 2016
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Keul
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