( ( These ( structural dissimilarities ) ) ( ( suggest ( that ( ( ( ( bird wings ) and ) ( bat wings ) ) ( ( were not ) ( inherited ( from ( ( a ( common ancestor ) ) ( with wings ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT These) (JJ structural) (NNS dissimilarities)) (VP (VBP suggest) (SBAR (IN that) (S (NP (NP (NN bird) (NNS wings)) (CC and) (NP (NN bat) (NNS wings))) (VP (VBD were) (RB not) (VP (VBN inherited) (PP (IN from) (NP (NP (DT a) (JJ common) (NN ancestor)) (PP (IN with) (NP (NNS wings)))))))))) (. .)))
These structural dissimilarities suggest that bird wings and bat wings were not inherited from a common ancestor with wings.
(ROOT (S (NP (NP (DT The) (NN bird) (NN ancestor)) (SBAR (WHNP (WDT that)) (S (VP (VBD lived) (PP (IN in) (NP (NNS trees))))))) (VP (VBD developed) (NP (NP (NNS wings)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (ADVP (RB commonly)) (VP (VBN associated) (PP (IN with) (NP (NNS birds))))))))) (. .)))
The bird ancestor that lived in trees developed wings, which is commonly associated with birds.