( ( Development ( of ( the embryo ) ) ) ( ( ( can only ) ( ( take place ) ( at ( the ( correct temperature ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Development)) (PP (IN of) (NP (DT the) (NN embryo)))) (VP (MD can) (ADVP (RB only)) (VP (VB take) (NP (NN place)) (PP (IN at) (NP (DT the) (JJ correct) (NN temperature))))) (. .)))
Development of the embryo can only take place at the correct temperature.
(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.