( ( ( ( Organisms ( that share ) ) ( common ancestors ) ) ( -LRB- ( and ( ( therefore ( have ( similar features ) ) ) -RRB- ) ) ) ) ( ( are ( grouped ( into ( groups ( called clades ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NP (NP (NNS Organisms)) (NP (DT that) (NN share))) (JJ common) (NNS ancestors)) (PRN (-LRB- -LRB-) (CC and) (S (NP (NNP therefore)) (VP (VBP have) (NP (JJ similar) (NNS features)))) (-RRB- -RRB-))) (VP (VBP are) (VP (VBN grouped) (PP (IN into) (NP (NP (NNS groups)) (VP (VBN called) (NP (NNS clades))))))) (. .)))
Organisms that share common ancestors (and therefore have similar features) are grouped into groups called clades .
(ROOT (S (NP (DT A) (NN clade)) (VP (VBZ is) (NP (NP (CD one) (NN way)) (PP (IN of) (NP (VBG classifying) (NNS organisms))))) (. .)))