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                                    Q. 13. What are Homologous organs? | 
                            
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Answer»  Homology refers to the traits inherited by two different organisms from a common ancestry. Organs such as bat's wing, wings of birds, seal's flipper, forelimb of a horse, and human arm have a common underlying anatomy that was present in their last common ancestors; therefore their forelimbs are homologous organs.  | 
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