( ( ( ( ( They ( ( show ( developing ( human embryos ) ) ) ( next ( to ( developing ( animal embryos ) ) ) ) ) ) , ) and ) ( ( ( ( the ( human embryos ) ) and ) ( the ( animal embryos ) ) ) ( look ( virtually indistinguishable ) ) ) ) . )
(ROOT (S (S (NP (PRP They)) (VP (VBP show) (S (VP (VBG developing) (NP (JJ human) (NNS embryos)))) (ADVP (JJ next) (PP (TO to) (NP (VBG developing) (NN animal) (NNS embryos)))))) (, ,) (CC and) (S (NP (NP (DT the) (JJ human) (NNS embryos)) (CC and) (NP (DT the) (NN animal) (NNS embryos))) (VP (VBP look) (ADJP (RB virtually) (JJ indistinguishable)))) (. .)))
They show developing human embryos next to developing animal embryos, and the human embryos and the animal embryos look virtually indistinguishable.
(ROOT (S (NP (NP (NNS Invertebrates)) (-LRB- -LRB-) (CC and) (NP (JJR higher) (NNS animals)) (-RRB- -RRB-)) (VP (MD can) (ADVP (RB also)) (VP (VB be) (VP (VBN placed) (PP (IN in) (NP (NP (CD one)) (PP (IN of) (NP (CD two) (NNS groups))))) (PP (VBN based) (PP (IN on) (SBAR (WHADVP (WRB how)) (S (NP (PRP they)) (VP (VBP develop) (PP (IN as) (NP (NNS embryos))))))))))) (. .)))
Invertebrates (and higher animals) can also be placed in one of two groups based on how they develop as embryos.