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

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Solution :Growth : Growth can be defined as an irreversible permanent increase in the SIZE of an organ or its parts or even of an individual cell.
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.
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.
Dedifferentiation : The living differentiated cells that have lost the capacity to divide can regain the capacity of division under certain conditions.
This phenomenon is termed as dedifferentiation.
Redifferentiation : Formation of meristems - interfascicular cambium and cork cambium from fully differentiated parenchyma cells.
While doing so, such meristems/tissues are able to divide and produce cells that once again lose the capacity to divide but mature to produce specific functions, i.e., redifferentiation.
Determinate growth : It refer to LIMITED growth. For example animals and plants. Leaves stop growing after having reached maturity.
Meristem : In plant growth is restricted to specialised regions where active cell divisions take place such a region is called meristem. There are three types of meristem : apical meristem, lateral meristem and intercalary meristem.
Growth Rates : It can be defined as the increased growth PER unit TIME.


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