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Which of the following features is characteristic of collenchyma tissue in plants?
Cells are dead at maturity
Provides mechanical support and flexibility
Uniformly thin cell walls
Large intercellular spaces
Provides mechanical support and flexibility
Collenchyma is a living mechanical tissue that provides structural support to growing plant parts. It is characterized by uneven cell wall thickening, primarily due to the deposition of cellulose, hemicellulose, and pectin.
Collenchyma is a living mechanical tissue that provides structural support to growing plant parts. It is characterized by uneven cell wall thickening, primarily due to the deposition of cellulose, hemicellulose, and pectin.
Think of collenchyma like the flexible plastic casing of a spring-loaded toy or a rubber hose, which provides enough structure to keep its shape but remains flexible enough to bend easily.
COLlenchyma = COLumns of flexibility (cells stay alive to provide support).
Cell┬аWall┬аCompositionтЙИCellulose+Hemicellulose+Pectin
The mechanical support is derived from the cell walls, which are thickened at the corners where cells meet. Because these cells remain alive and lack rigid secondary walls like sclerenchyma, they provide tensile strength while allowing the plant organ to bend and flex without breaking under stress or wind.
Cells are living at maturity with protoplasm.
Localized thickening of cell walls at corners.
Found in petioles, leaves, and young stems.
Provides flexibility, allowing stems to bend in the wind.
Provides structural support in elongating regions of the plant.
Allows for differential growth while maintaining mechanical integrity.
Does not provide as much rigidity as sclerenchyma.
Supports the growth of young stems.
Provides strength to the petioles of leaves.
Option A is incorrect because collenchyma cells are living; sclerenchyma cells are dead at maturity.
Option C is incorrect because collenchyma has uneven thickening, not uniformly thin walls.
Option D is incorrect because collenchyma cells are tightly packed with little to no intercellular spaces.
B is correct тАФ Collenchyma tissue provides mechanical support to the plant while maintaining flexibility in growing stems and leaves.
Always differentiate between Simple Permanent Tissues (Parenchyma, Collenchyma, Sclerenchyma) based on their cell wall composition: Parenchyma (thin), Collenchyma (uneven/thick corners), and Sclerenchyma (thick/lignified).