AP BIOLOGY

Detailed explanation-1: -The sclerenchyma is called the dead tissue because it lack protoplasm and has thick secondary walls which do not elongate during cell growth. Hence, mature cells get destroyed inside the sclerenchyma tissues.

Detailed explanation-2: -Mature sclerenchyma cells are usually dead cells that have heavily thickened secondary walls containing lignin. The cells are rigid and nonstretchable and are usually found in nongrowing regions of plant bodies, such as the bark or mature stems.

Detailed explanation-3: -Sclerenchyma is dead tissue. They give mechanical support to the plants.

Detailed explanation-4: -Sclerenchyma: Sclerenchyma cells consist of dead cells they are permanent tissues present in plants. They provide hardness and protection for plants.

Detailed explanation-5: -Sclerenchyma is classified into two types based on their structure, origin and development. They are sclereids and fibres.