( ( Analogous structures ) ( ( ( ( ( ( look similar ) and ) ( have ( the ( same function ) ) ) ) , ) ( even ( though ( they ( may ( ( be completely ) ( ( unrelated embryologically ) ( , ( ( ( such ( as ( ( the wing ) ( of ( a bat ) ) ) ) ) and ) ( ( the wing ) ( of ( a butterfly ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Analogous) (NNS structures)) (VP (VP (VBP look) (ADJP (JJ similar))) (CC and) (VP (VBP have) (NP (DT the) (JJ same) (NN function))) (, ,) (SBAR (RB even) (IN though) (S (NP (PRP they)) (VP (MD may) (VP (VB be) (ADVP (RB completely)) (UCP (ADJP (JJ unrelated) (RB embryologically)) (, ,) (PP (JJ such) (IN as) (NP (NP (DT the) (NN wing)) (PP (IN of) (NP (DT a) (NN bat))))) (CC and) (NP (NP (DT the) (NN wing)) (PP (IN of) (NP (DT a) (NN butterfly)))))))))) (. .)))
Analogous structures look similar and have the same function, even though they may be completely unrelated embryologically, such as the wing of a bat and the wing of a butterfly.
(ROOT (S (NP (DT The) (NN term) (NN analogous)) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB describe) (NP (NP (NNS structures)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (ADJP (JJ similar) (PP (IN in) (NP (JJ unrelated) (NNS organisms))))))))))))) (. .)))