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2014-12-20T21:16:59+05:30
Hen...................................................................
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2014-12-20T21:49:28+05:30

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The egg came first.  The egg could be formed due to combination of various chemical compounds, polymers, proteins, RNA and DNA. 

But a hen or chicken  can only grow from an egg - a hen has to take birth and grow in size .  A hen could not be formed out of  some chemicals with its shape,  limbs and organs.
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