( It ( ( looks ( as ( though ( ( in ( ( the ( early evolution ) ) ( of ( living things ) ) ) ) ( , ( ( a ( few ( organochlorine compounds ) ) ) ( were ( included ( in ( their ( biochemical systems ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ looks) (SBAR (RB as) (IN though) (S (PP (IN in) (NP (NP (DT the) (JJ early) (NN evolution)) (PP (IN of) (NP (VBG living) (NNS things))))) (, ,) (NP (DT a) (JJ few) (NN organochlorine) (NNS compounds)) (VP (VBD were) (VP (VBN included) (PP (IN in) (NP (PRP$ their) (JJ biochemical) (NNS systems)))))))) (. .)))
It looks as though in the early evolution of living things, a few organochlorine compounds were included in their biochemical systems.
(ROOT (S (PP (ADVP (RB Similarity)) (IN in) (NP (NNS biochemicals))) (, ,) (PP (IN like) (NP (NP (DT the) (NN glucose)) (VP (VBN used) (PP (IN by) (NP (NP (RB virtually) (DT all) (NN living) (NNS things)) (PP (IN for) (NP (NN energy)))))))) (, ,) (VP (VBZ provides) (NP (NP (NN evidence)) (PP (IN of) (NP (NN evolution))))) (. .)))