Oh the Variety!

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…vascular system known as the xylem and phloem. The tubed- shaped cells in the xylem carry the water and minerals up from the roots. The phloem is a living tissue that distributes the needed sugar, amino acids and other needed organic materials throughout the plant. Other adaptations that are not seen in all groups of vascular plants include the seed, alternation of generations and the replacement of the flagellated sperm with the pollen. ------------------------------------------------------------------------ **Bibliography**