Growth:

It is an irreversible and permanent process, accomplished by an increase in the size of an organ or organ parts or even of an individual cell.

Differentiation:

It is a process in which the. cells derived from the apical meristem and the cambium undergo structural changes in the cell wall and the protoplasm, becoming mature to perform specific functions.

Development:

It refers to the various changes occurring in an organism during its life cycle from the germination of seeds to senescence.

De-differentiation:

It is the process in which permanent plant cells regain the power to divide under certain conditions.

Re-differentiation:

It is the process in which differentiated cells become mature again and lose their capacity to divide.

Determinate growth:

It refers to limited growth. For example, animals and plant leaves stop growing after having reached maturity.

Meristem:

In plants, growth is restricted to specialised regions where active cell divisions take place. Such a region is called meristem.

Growth rate:

It can be defined as the increased growth in plants per unit time.