( ( ALLOPATRIC ( SPECIATION ( Allopatric speciation ) ) ) ( ( ( is ( ( the formation ) ( of ( new species ) ) ) ) ( after ( ( a population ) ( has ( been ( separated geographically ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP ALLOPATRIC) (NNP SPECIATION) (NNP Allopatric) (NNP speciation)) (VP (VBZ is) (NP (NP (DT the) (NN formation)) (PP (IN of) (NP (JJ new) (NNS species)))) (SBAR (IN after) (S (NP (DT a) (NN population)) (VP (VBZ has) (VP (VBN been) (VP (VBN separated) (ADVP (RB geographically)))))))) (. .)))
ALLOPATRIC SPECIATION Allopatric speciation is the formation of new species after a population has been separated geographically.
(ROOT (S (NP (JJ Sympatric) (NN speciation)) (VP (VBZ is) (SBAR (WHADVP (WRB when)) (S (NP (DT a) (JJ new) (NN species)) (VP (VBZ arises) (PP (IN without) (NP (JJ geographic) (NN separation))))))) (. .)))