( analogous ( ( Structures ( that ( ( ( have ( ( similar functions ) ( in ( two organisms ) ) ) ) but ) ( ( have not ) ( evolved ( from ( a ( ( common ancestral ) form ) ) ) ) ) ) ) ) . ) )
(ROOT (SINV (ADJP (JJ analogous)) (VP (VBZ Structures)) (SBAR (WHNP (WDT that)) (S (VP (VP (VBP have) (NP (NP (JJ similar) (NNS functions)) (PP (IN in) (NP (CD two) (NNS organisms))))) (CC but) (VP (VBP have) (RB not) (VP (VBN evolved) (PP (IN from) (NP (DT a) (ADJP (JJ common) (JJ ancestral)) (NN form)))))))) (. .)))
analogous Structures that have similar functions in two organisms but have not evolved from a common ancestral form.
(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))))))))))))) (. .)))