Define growth, differentiation, development, dedifferentiation,
redifferentiation, determinate growth, meristem and growth rate.
It is an irreversible and permanent process, accomplished by an
increase in the size of an organ or organ parts or even of an
It is a process in which the cells derived from the apical
meristem (root and shoot apex) and the cambium undergo structural
changes in the cell wall and the protoplasm, becoming mature to
perform specific functions.
It refers to the various changes occurring in an organism during
its life cycle - from the germination of
seeds to senescence.
It is the process in which permanent plant cells regain the power
to divide under certain conditions.
It is the process in which de-differentiated cells become mature
again and lose their capacity to divide.
(f) Determinate growth
It refers to limited growth. For example, animals and plant
leaves stop growing after having reached maturity.
In plants, growth is restricted to specialised regions where
active cell divisions take place. Such a region is called
meristem. There are three types of meristems
- apical meristem, lateral meristem, and
(h) Growth rate
It can be defined as the increased growth in plants per unit
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