Q. Death of protoplasm is a pre-requisite for a vital function like

 2332  179 AIPMTAIPMT 1989Anatomy of Flowering Plants Report Error

Solution:

Death of protoplasm is a pre-requisite for a vital functions like transport of sap. Xylem is a dead tissue and do not have protoplasm, xylem performs the function of transport of water or sap inside the plant from roots to leaves.