( ( ( ( ( embryonic ( gill slits ) ) and ) ( ( ( ( a notochord ) ( a ( stream-lined body ) ) ) and ) ( ( ( jaws ( amniotic eggs ) ) and ) ( internal fertilization ) ) ) ) ( paired ( ( ( fins and ) ( a ( post-anal tail ) ) ) ( Unlike reptiles ) ) ) ) ( , ( birds ( ( lay eggs ) . ) ) ) )
(ROOT (S (S (NP (NP (JJ embryonic) (JJ gill) (NNS slits)) (CC and) (NP (NP (NP (DT a) (NN notochord)) (NP (DT a) (JJ stream-lined) (NN body))) (CC and) (NP (NP (JJ jaws) (JJ amniotic) (NNS eggs)) (CC and) (NP (JJ internal) (NN fertilization))))) (VP (VBN paired) (S (NP (NP (NNS fins)) (CC and) (NP (DT a) (JJ post-anal) (NN tail))) (PP (IN Unlike) (NP (NNS reptiles)))))) (, ,) (NP (NNS birds)) (VP (VBD lay) (NP (NNS eggs))) (. .)))
embryonic gill slits and a notochord a stream-lined body and jaws amniotic eggs and internal fertilization paired fins and a post-anal tail Unlike reptiles, birds lay eggs.
(ROOT (S (NP (JJS Most) (NNS reptiles)) (VP (VBD lay) (NP (JJ amniotic) (NNS eggs))) (. .)))