( ( This bone ) ( ( ( ( will ( grow ( into ( ( the spaces ) ( between ( ( your backbones ) ( -LRB- ( vertebrae -RRB- ) ) ) ) ) ) ) ) and ) ( will ( hold ( them straight ) ) ) ) . ) )
(ROOT (S (NP (DT This) (NN bone)) (VP (VP (MD will) (VP (VB grow) (PP (IN into) (NP (NP (DT the) (NNS spaces)) (PP (IN between) (NP (NP (PRP$ your) (NNS backbones)) (PRN (-LRB- -LRB-) (NP (NN vertebrae)) (-RRB- -RRB-)))))))) (CC and) (VP (MD will) (VP (VB hold) (S (NP (PRP them)) (ADJP (RB straight)))))) (. .)))
This bone will grow into the spaces between your backbones (vertebrae) and will hold them straight.
(ROOT (S (NP (NNP Vertebrata)) (VP (VBP are) (VP (VBN characterized) (PP (IN by) (NP (NP (DT the) (NN presence)) (PP (IN of) (NP (NN backbone))))))) (. .)))
Vertebrata are characterized by the presence of backbone.