( It ( ( ( ( covers and ) protects ) ( ( ( the ( apical meristem ) ) ( -LRB- ( ( the ( ( actively growing ) region ) ) -RRB- ) ) ) ( of ( the root ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ covers) (CC and) (VBZ protects) (NP (NP (NP (DT the) (JJ apical) (NN meristem)) (PRN (-LRB- -LRB-) (NP (DT the) (ADJP (RB actively) (JJ growing)) (NN region)) (-RRB- -RRB-))) (PP (IN of) (NP (DT the) (NN root))))) (. .)))
It covers and protects the apical meristem (the actively growing region) of the root.
(ROOT (S (NP (NNS Roots)) (VP (VBP grow) (PP (IN in) (NP (NN length) (CC and) (NN width))) (PP (IN from) (NP (DT the) (JJ primary) (CC and) (JJ secondary) (NN meristem)))) (. .)))