SCIENCE
BOTANY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Collenchyma
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Trachied
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Sclerids
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Fibers
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Detailed explanation-1: -Collenchyma is a supporting tissue composed of more or less elongated living cells with unevenly thickened, nonlignified primary walls. It is in regions of primary growth in stems and leaves.
Detailed explanation-2: -They function for structural support. Collenchyma cells are characterized by having a thickened primary cell wall that is not lignified.
Detailed explanation-3: -It is the main supporting tissue of growing organs with walls thickening during and after elongation. In older organs, collenchyma may become more rigid due to changes in cell wall composition or may undergo sclerification through lignification of newly deposited cell wall material.
Detailed explanation-4: -Note: Collenchyma tissue cell walls are thickened, when they become thick at the corners where cells are joined it is angular. Lamellar collenchyma is thickened at their tangential walls which are parallel with the surface. Hence, Lignin is absent in collenchyma.
Detailed explanation-5: -So, the correct answer is ‘Collenchyma’