AP BIOLOGY

Detailed explanation-1: -Sclerenchyma is a simple permanent tissue with thick secondary lignified cell walls.

Detailed explanation-2: -Sclerenchyma cells have very thick secondary walls that are commonly impregnated with lignin, which makes them quite rigid. There are two types of sclerenchyma cells, elongate fibers and more compact stone cells (sclerids).

Detailed explanation-3: -The cell walls of sclerenchyma have thickened secondary layers made from cellulose, hemicelluloses and lignin.

Detailed explanation-4: -Sclerenchyma cells have thick, lignified secondary walls, lack cell contents at maturity, and occur throughout all plant tissues. These features make sclerenchyma tissues hard, rigid, and somewhat brittle. Sclerenchyma cells can occur as aggregates within ground tissue (sclereids or stone cells or as elongated fibers.

Detailed explanation-5: -Sclerenchyma is a type of simple permanent tissue. Simple tissues are made up of a group of uniform cells having similar structures and perform the same function. Other than sclerenchyma, collenchyma and parenchyma are also simple tissues.