give 2 important function of the leaf state the type of roots
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The plant root system constitutes the major part of the plant body, both in terms of function and bulk. In terrestrial plants, the root system is the subterranean or underground part of the plant body while the shoot is the aboveground part. Roots are branching organs which grow downward into the soil, a manifestation of geotropism. Branching occurs irregularly and not from nodes as in stems.
In contrast to shoot, the plant root has no leaves, nodes, internodes and buds. With rare exception, roots also lack stomata. Other morphological and anatomical features which are distinct to this plant structure are: (1) a hard, protective root cap at the tip of the root; (2) absence of the pith; (3) presence of endodermis; and (4) presence of pericycle next to the endodermis. These features are found in the root apex which is divided into three regions: (1) a region of cell division which includes the apical meristem protected by the root cap, (2) a short region of cell elongation where individual cells elongate and force the root tip to move forward through the soil, and (3) a region of cell differentiation and maturation.