( Populations ( ( are ( ( ( groups ( of ( organisms ( of ( the ( same type ) ) ) ) ) ) , ) ( living ( in ( the ( same area ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Populations)) (VP (VBP are) (NP (NP (NNS groups)) (PP (IN of) (NP (NP (NNS organisms)) (PP (IN of) (NP (DT the) (JJ same) (NN type))))) (, ,) (VP (VBG living) (PP (IN in) (NP (DT the) (JJ same) (NN area)))))) (. .)))
Populations are groups of organisms of the same type, living in the same area.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (DT a) (NN group)) (PP (IN of) (NP (NP (NNS organisms)) (PP (IN of) (NP (DT the) (JJ same) (NN species)))))) (SBAR (IN that) (S (VP (VBP live) (PP (IN in) (NP (DT the) (JJ same) (NN area)))) (NP (DT a) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NN population))))) (. .)))