(N/A) Meristems are specialized regions of plant growth where active cell division occurs. They are classified into three types based on their location:
$1$. Apical meristem: Located at the root and shoot apices. The shoot apical meristem is at the tip of the shoots,responsible for stem elongation and leaf formation. The root apical meristem aids in root elongation.
$2$. Intercalary meristem: Located between masses of mature tissues,specifically at the bases of leaves or internodes in grasses. It helps in the regeneration of parts removed by grazing herbivores. Both apical and intercalary meristems are considered primary meristems.
$3$. Lateral meristem: Found in the mature regions of roots and shoots. It is known as secondary meristem because it appears later in the plant's life. It is responsible for increasing the girth of the plant by adding secondary tissues. Examples include fascicular vascular cambium,interfascicular cambium,and cork cambium.