Explain the following terms in the context of plant growth and development:
$(1)$ Differentiation,dedifferentiation,and redifferentiation
$(2)$ Development

(N/A) $(1)$ Differentiation,Dedifferentiation,and Redifferentiation:
- Differentiation: The process by which cells derived from the root apical and shoot-apical meristems and cambium differentiate and mature to perform specific functions. This leads to major structural changes in cell walls and protoplasm.
- Dedifferentiation: The phenomenon where differentiated living cells,which have lost the capacity to divide,regain the capacity to divide under certain conditions. For example,the formation of meristems from fully differentiated parenchyma cells.
- Redifferentiation: The process where dedifferentiated cells divide and produce cells that once again lose the capacity to divide but mature to perform specific functions.
$(2)$ Development:
- Development is a term that includes all changes that an organism goes through during its life cycle,from germination of the seed to senescence. It is the sum of growth and differentiation. In plants,it is controlled by both intrinsic (genetic/hormonal) and extrinsic (light,temperature,water,oxygen,nutrition) factors.