Correct Option
The correct option is (c).
Explanation
Sclerenchyma is a type of simple permanent tissue in plants. Unlike parenchyma and collenchyma, sclerenchyma cells are typically dead at maturity and are specialized for providing mechanical support and structural integrity to the plant.
Statement-wise Analysis
- Statement 1 is Correct: Sclerenchyma is the main mechanical tissue in plants. Its primary function is to provide mechanical strength, making the plant parts hard and stiff to withstand various environmental stresses.
- Statement 2 is Incorrect: The cells of sclerenchyma do not have thin walls made of cellulose. Instead, they possess long, narrow cells with thick and lignified cell walls. Lignin acts as a cementing material that hardens the cell wall. Thin walls made of cellulose are a characteristic of parenchyma tissue.
- Statement 3 is Correct: Sclerenchyma is widely distributed in plant bodies. It is found in stems (around vascular bundles), in the veins of leaves, and in the hard covering of seeds and nuts. For example, the husk of a coconut is made of sclerenchymatous tissue.
Key Takeaway
Sclerenchyma consists of dead cells with thick, lignified walls and provides mechanical strength and hardness to plant parts, such as seed coats and nut shells.