( ( Sympatric speciation ) ( ( refers ( to ( ( the formation ) ( of ( ( ( ( ( two or ) more ) ( descendant species ) ) ( from ( a ( single ( ancestral species ) ) ) ) ) ( all ( occupying ( the ( same ( geographic location ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Sympatric) (NN speciation)) (VP (VBZ refers) (PP (TO to) (NP (NP (DT the) (NN formation)) (PP (IN of) (S (NP (NP (QP (CD two) (CC or) (JJR more)) (NN descendant) (NNS species)) (PP (IN from) (NP (DT a) (JJ single) (CD ancestral) (NNS species)))) (RB all) (VP (VBG occupying) (NP (DT the) (JJ same) (JJ geographic) (NN location)))))))) (. .)))
Sympatric speciation refers to the formation of two or more descendant species from a single ancestral species all occupying the same geographic location.
(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))))))) (. .)))