Q.Explain, with examples, the difference between differentiation and dedifferentiation, taking the formation of the vascular cambium and the cork cambium as your illustrations.

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Differentiation: a meristematic cell matures into a specific type (e.g. xylem vessel). Dedifferentiation: an already-mature cell regains division capacity (e.g. cork cambium forming from parenchyma). …

Differentiation is the structural and biochemical change by which a dividing meristematic cell matures into a specific, function-specific cell type, typically losing its own further capacity to divide in the process -- the maturation of a young cambial derivative into a lignified xylem vessel element, specialised for water conduction, is a clear example. Dedifferentiation is, in a sense, the reverse step: an already mature, differentiated cell that would ordinarily no longer divide instead regains that capacity under appropriate conditions. The formation of the vascular cambium from mature interfascicular parenchyma cells of a young dicot stem illustrates this directly -- these cells had already differentiated into ordinary parenchyma, yet resume active division and organise into a new meristem. The cork cambium (phellogen) provides a second illustration, forming similarly from mature cortical or epidermal parenchyma of an ageing or wounded stem. …

Define each term against the direction of change (meristematic-to-mature for differentiation; mature-to-dividing-again for dedifferentiation), then attach the vascu …

Treating differentiation and dedifferentiation as unrelated processes rather than opposite directions of the same underlying …