( ( Describe ( ( the ( adaptive significance ) ) ( of ( ( ( the ( next ( three ( major steps ) ) ) ) ( -LRB- ( ( ( ( ( ( vascular tissue ) , ) seeds ) , ) flowers ) -RRB- ) ) ) ( in ( ( the evolution ) ( of ( diversity ( in ( the ( plant kingdom ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Describe) (NP (NP (DT the) (JJ adaptive) (NN significance)) (PP (IN of) (NP (NP (NP (DT the) (JJ next) (CD three) (JJ major) (NNS steps)) (PRN (-LRB- -LRB-) (NP (NP (NN vascular) (NN tissue)) (, ,) (NP (NNS seeds)) (, ,) (NP (NNS flowers))) (-RRB- -RRB-))) (PP (IN in) (NP (NP (DT the) (NN evolution)) (PP (IN of) (NP (NP (NN diversity)) (PP (IN in) (NP (DT the) (NN plant) (NN kingdom))))))))))) (. .)))
Describe the adaptive significance of the next three major steps ( vascular tissue, seeds, flowers ) in the evolution of diversity in the plant kingdom.
(ROOT (S (NP (NNP Modern) (NNS plants)) (VP (VBP have) (NP (NP (CD three) (NNS types)) (PP (IN of) (NP (JJ major) (NNS tissues))))) (. .)))