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                                    Which of the following is not an aerial adaptaion of birds and why?1) Presence of feathers over the body2) Presence of dense bones3) Streamlined body | 
                            
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Answer» Which of the following is not an aerial adaptaion of birds and why? 1) Presence of feathers over the body 2) Presence of dense bones 3) Streamlined body  | 
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