Question

Sclerenchyma is a simple permanent tissue with thick secondary lignified cell walls. Which of the following cells have the secondary cell walls?

• A. The cells containing cytoplasm only.
• B. The cells with protoplast.
• C. The cells which are living at maturity.
• D. The cells which are non living at maturity.

Answer 1

The correct option is D The cells which are non living at maturity.

• A simple permanent tissue represents a group of permanent cells that are structurally and functionally similar i.e. a group of similar permanent cells that perform a common function.
• Simple permanent tissues are of three types: Parenchyma, Collenchyma, and Sclerenchyma.
• Sclerenchyma is a thick-walled, lignified permanent tissue which is characterized by the absence of living protoplast.
• These dead cells have a secondary cell wall due to the high deposition of lignin.
• Its principal function is to provide mechanical support.
• Hence, the correct option is D.