( ( All ( living ( ( populations and ) species ) ) ) ( ( are ( continuously ( changing ( in ( response ( ( ( ( to ( pressures ( from ( other organisms ) ) ) ) , ) and ) ( to ( variability ( in ( ( Earth 's ) ( ( geology and ) climate ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT All) (NN living) (NNS populations) (CC and) (NNS species)) (VP (VBP are) (ADJP (RB continuously) (VBG changing) (PP (IN in) (NP (NP (NN response)) (PP (PP (TO to) (NP (NP (NNS pressures)) (PP (IN from) (NP (JJ other) (NNS organisms))))) (, ,) (CC and) (PP (TO to) (NP (NP (NN variability)) (PP (IN in) (NP (NP (NNP Earth) (POS 's)) (NN geology) (CC and) (NN climate)))))))))) (. .)))
All living populations and species are continuously changing in response to pressures from other organisms, and to variability in Earth's geology and climate.
(ROOT (S (NP (NP (DT All) (NNS members)) (PP (IN of) (NP (DT a) (NN species) (NN living)))) (ADVP (RB together)) (VP (VB form) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN population))) (. .)))