Question

Lignified,narrow,elongated and dead cell are found in

Answer 1

Not sure but Plants is the right Answer

Answer 2

The parenchyma cells layer is a thin-walled, flexible and lignified layer.

Explanation:  

They found alive only on maturity else they are dead. “The permanent tissues” are further classified into 'the parenchyma', 'collenchyma', and 'sclerenchyma'. The nucleus is present in "parenchyma and collenchyma" but absent in sclerenchyma.

These are tissue from meristematic cells, they have a definite shape, size, and function. This process of formation of a cell with a definite "shape, size and function" is called differentiation.