MICROANATOMY

Detailed explanation-1: -The best characterized stem cell in the plant reside in the root apical meristem (RAM) and the shoot apical meristem (SAM), which called apical meristem, are responsible for plant longitudinal growth. These stem cells remain as pluripotent state throughout the lifespan of the plant.

Detailed explanation-2: -Some roots, called adventitious roots, arise from an organ other than the root-usually a stem, sometimes a leaf. They are especially numerous on underground stems, such as rhizomes, corms, and tubers, and make it possible to vegetatively propagate many plants from stem or leaf cuttings.

Detailed explanation-3: -Both the roots and stems of plants have vascular tissues within them arranged in bundles known as phloem and xylem. Phloem is used for the transportation of food, or glucose, made in the leaves and other photosynthetic tissues of the plant.