Talk about Adaptations to land colonizations.

Land colonization was marked by differentiation of specialized structures for photosynthesis, support and anchor to ground. Leaves, photosynthetic areas are provided with pores allowing gas exchange. Stems and leaves are covered by cuticle, preventing water loss. Lignin thickening of cellulosic walls confers rigidity allowing support of aerial organs and the upright shape. Differentiation of conducting tissues (Xylem and phloem) is essential for transport of viral elements (water, minerals, products of photosynthesis) through plant organs. Roots improve ground mounting, absorption of water and mineral nutrition Simultanously we have devices that adapt to terrestrial conditions that appear, allowing greater protection of reproductive cells, embryos and spores.