The answer is to colonize land ecosystems.
*Over time, plants developed structural adaptations of vascular systems and seeds in order to colonize land ecosystems.
*Vascular systems of the plants provide essentials function such as carrying water, essential mineral nutrients, sugars, as well as amino acids and transporting them to various plant organs.
*The xylem and phloem of the vascular bundles help water and food to be distributed to all parts of the plants. The vascular system helps the plants to be well adapted to the inland ecosystem because of its function.