1.Primary meristem. Apical meristem : Present at the growing tips of stems and roots, they increase the length of the stem and root. They form growing parts at the apices of roots and stems and are responsible for the increase in length, also called primary growth. This meristem is responsible for the linear growth of an organ. 2.Secondary meristem.
1Primary meristem Apical meristem  Present at the growing tips of stems and roots they increase the length of the stem and root They form growing parts at the apices of roots and stems and are responsible for the increase in length also called primary growth This meristem is responsible for the linear growth of an organ 2Secondary meristem