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Question
Hard, lignified, thick-walled, long and pointed cells constitute
Hard, lignified, thick-walled, long and pointed cells constitute
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Solution
The correct option is D Sclerenchyma
Sclerenchyma cells have thick lignified secondary walls and often die when mature. It provides the main structural support to a plant. They are long and pointed cells. Parenchyma cells have thin primary walls and usually remain alive after they become mature. It forms the filler tissue in the soft parts of plants. Collenchyma cells have thin primary walls with some areas of secondary thickening. Collenchyma provides extra structural support, particularly in regions of new growth. Sclereids are a reduced form of sclerenchyma cells with highly thickened, lignified cellular walls that form small bundles of durable layers of tissue in most plants. Sclereids are relatively short.
Hence the correct option is D.
Sclerenchyma cells have thick lignified secondary walls and often die when mature. It provides the main structural support to a plant. They are long and pointed cells.
Parenchyma cells have thin primary walls and usually remain alive after they become mature. It forms the filler tissue in the soft parts of plants.
Collenchyma cells have thin primary walls with some areas of secondary thickening. Collenchyma provides extra structural support, particularly in regions of new growth.
Sclereids are a reduced form of sclerenchyma cells with highly thickened, lignified cellular walls that form small bundles of durable layers of tissue in most plants. Sclereids are relatively short.
Hence the correct option is D.
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