( It ( so ( ( happens ( that ( ( ( ( every chordate ) , ) ( whether ( it ( s ( ( a tunicate ) ( in ( ( ( the ocean ) or ) ( a human ) ) ) ) ) ) ) ) ( has ( ( every one ) ( of ( ( these traits ) ( at ( ( some time ) ( in ( their development ) ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (PRP It)) (ADVP (RB so)) (VP (VBZ happens) (SBAR (IN that) (S (NP (NP (DT every) (NN chordate)) (, ,) (SBAR (IN whether) (S (NP (PRP it)) (VP (VBZ s) (NP (NP (DT a) (NN tunicate)) (PP (IN in) (NP (NP (DT the) (NN ocean)) (CC or) (NP (DT a) (NN human))))))))) (VP (VBZ has) (NP (NP (DT every) (NN one)) (PP (IN of) (NP (NP (DT these) (NNS traits)) (PP (IN at) (NP (NP (DT some) (NN time)) (PP (IN in) (NP (PRP$ their) (NN development)))))))))))) (. .)))
It so happens that every chordate, whether it s a tunicate in the ocean or a human has every one of these traits at some time in their development.
(ROOT (S (NP (JJ Adult) (NNS humans)) (VP (VBP lack) (NP (NP (DT some)) (PP (IN of) (NP (NP (DT the) (VBG defining) (NNS traits)) (PP (IN of) (NP (NNS chordates))))))) (. .)))