Answers

2014-04-27T17:18:10+05:30
Their body mass is too large for their wingspan and wing muscles, and they have evolved in such a way that they no longer posses the innate knowledge of how to fly. Their wing muscles cant support their weight.That is why they cannot fly.........
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2014-04-27T17:29:04+05:30
Their body mass is is too large for their wingspan and wing muscles.so ostrich cannot fly    
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