( ( ( ( Animals ( can ( be ( ( transferred ( from ( one place ) ) ) ( to ( ( ( another ( as ( embryos ( in ( test tubes ) ) ) ) ) , ) ( implanted ( into ( foster mothers ) ) ) ) ) ) ) ) ) and ) ( then ( , ( ( when ( they ( have grown ) ) ) ( , ( they ( can ( be ( used ( in ( breeding programs ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNS Animals)) (VP (MD can) (VP (VB be) (VP (VBN transferred) (PP (IN from) (NP (CD one) (NN place))) (PP (TO to) (NP (NP (DT another)) (PP (IN as) (NP (NP (NNS embryos)) (PP (IN in) (NP (NN test) (NNS tubes))))) (, ,) (VP (VBN implanted) (PP (IN into) (NP (JJ foster) (NNS mothers)))))))))) (CC and) (S (ADVP (RB then)) (, ,) (SBAR (WHADVP (WRB when)) (S (NP (PRP they)) (VP (VBP have) (VP (VBN grown))))) (, ,) (NP (PRP they)) (VP (MD can) (VP (VB be) (VP (VBN used) (PP (IN in) (NP (VBG breeding) (NNS programs))))))) (. .)))
Animals can be transferred from one place to another as embryos in test tubes, implanted into foster mothers and then, when they have grown, they can be used in breeding programs.
(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.