question_answer 1)

Define growth, differentiation, development, dedifferentiation, redifferentiation, determinate growth, meristem and growth rate. 

Answer:

Growth It is an irreversible permanent increase in size of an organ or its parts or even of an individual cell. Development It is the process of whole series of changes which an organism goes through during its life cycle. Meristems The cells of which the capacity to divide and self-perpetuate. Growth Rates The increased growth per unit time is termed as growth rate. Thus, rate of growth can be expressed mathematically. An organism, or a part of the organism can produce more cells in a variety of ways. The growth rate shows an increase that may be arithmetic or geometrical. Differentiation The cells derived from root apical and shoot-apical meristems and cambium differentiate and mature to perform specific functions. This act leading to maturation is termed as differentiation. Dedifferentiation The living differentiated cells, that by now have lost the capacity to divide can regain the capacity of division under certain conditions. This phenomenon is termed as dedifferentiation. For example, formation of meristems; interfascicular cambium and cork cambium from fully differentiated parenchyma cells. Redifferentiation While undergoing dedifferentiation plant cells once again lose their capacity to divide and become mature. This process is called redifferentiation.