( ( ( population ( A group ) ) ( of ( organisms ( of ( ( the ( same species ) ) ( that ( occupy ( ( ( a ( particular ( geographic area ) ) ) or ) region ) ) ) ) ) ) ) ) . )
(ROOT (NP (NP (NN population) (DT A) (NN group)) (PP (IN of) (NP (NP (NNS organisms)) (PP (IN of) (NP (NP (DT the) (JJ same) (NN species)) (SBAR (WHNP (WDT that)) (S (VP (VB occupy) (NP (NP (DT a) (JJ particular) (JJ geographic) (NN area)) (CC or) (NP (NN region)))))))))) (. .)))
population A group of organisms of the same species that occupy a particular geographic area or region.
(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))))) (. .)))