( ( Most ( of these ) ) ( ( are ( ( marsupials , ) ( which ( means ( ( ( ( their young ) ( are ( born ( ( blind and ) bald ) ) ) ) and ) ( they ( ( complete ( their development ) ) ( in ( their ( mothers pouch ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJS Most)) (PP (IN of) (NP (DT these)))) (VP (VBP are) (NP (NP (NNS marsupials)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ means) (SBAR (S (S (NP (PRP$ their) (JJ young)) (VP (VBP are) (VP (VBN born) (S (ADJP (JJ blind) (CC and) (JJ bald)))))) (CC and) (S (NP (PRP they)) (VP (VB complete) (NP (PRP$ their) (NN development)) (PP (IN in) (NP (PRP$ their) (NNS mothers) (NN pouch)))))))))))) (. .)))
Most of these are marsupials, which means their young are born blind and bald and they complete their development in their mothers pouch.
(ROOT (S (NP (PRP You)) (VP (VBP call) (SBAR (WHNP (DT an) (NN animal) (WHPP (IN in) (WHNP (WDT which)))) (S (NP (NP (DT the) (NN embryo)) (, ,) (VP (ADVP (RB often)) (VBN termed) (NP (DT a) (NN joey))) (, ,)) (VP (VP (VBZ is) (VP (VBN born) (S (ADJP (JJ immature))))) (CC and) (VP (MD must) (VP (VB complete) (NP (PRP$ its) (NN development)) (PP (IN outside) (NP (NP (DT the) (NN mother) (POS 's)) (NN body))))) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN marsupial)))))) (. .)))