( However ( , ( all ( ( ( ( share ( certain characteristics ) ) and ) ( need ( ( some level ) ( of support ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB However)) (, ,) (NP (DT all)) (VP (VP (VBP share) (NP (JJ certain) (NNS characteristics))) (CC and) (VP (VBP need) (NP (NP (DT some) (NN level)) (PP (IN of) (NP (NN support)))))) (. .)))
However, all share certain characteristics and need some level of support.
(ROOT (S (NP (DT All) (NNS cells)) (VP (VBP share) (NP (DT the) (NN characteristic)) (SBAR (IN that) (S (NP (PRP they)) (VP (VBP need) (NP (NN energy)))))) (. .)))
All cells share the characteristic that they need energy.