Question

The tissue having dead cells is

• A. Xylem
• B. Collenchyma
• C. Parenchyma
• D. Phellogen

Answer 1

Answer: (A)

Xylem

• The xylem is composed of- xylem parenchyma cells, xylem fibre cells both of which provide structural support for the tracheary elements of the xylem.
  
• The tracheary elements become completely dead at maturity which is a pipe- like structure that allows water and dissolved materials to flow through them.
• The tracheary elements are of 2 types- vessel elements and tracheids.
• As the tracheary elements are dead at maturity they play a passive role in the transportation of water through the plant.
• These tracheary elements of xylem have a secondary cell wall thickenings in the form of rings which provide maximum structural support.
• So, the correct answer is 'Xylem'