( ( Unlike ( terrestrial plants ) ) ( , ( alga ( ( ( do not ) ( have ( true ( vascular tissues ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN Unlike) (NP (JJ terrestrial) (NNS plants))) (, ,) (NP (NN alga)) (VP (VBP do) (RB not) (VP (VB have) (NP (JJ true) (NN vascular) (NNS tissues)))) (. .)))
Unlike terrestrial plants, alga do not have true vascular tissues.
(ROOT (S (NP (NP (JJ Present-day) (NNS plants)) (SBAR (WHNP (WDT that)) (S (VP (VBP have) (NP (DT a) (JJ complex) (NN vascular) (NN tissue) (NN system)))))) (VP (VBP are) (VP (VBN called) (NP (NN vasuluar) (NNS plants)))) (. .)))