Question

All the elements, when mature, are dead except

• A. Tracheids
• B. Vessels
• C. Xylem parenchyma
• D. Xylem fibres

Answer 1

The correct option is C Xylem parenchyma

• Xylem consists of two types of conducting cells- tracheids and vessels which have thick lignified secondary walls and become dead at maturity.
  
• Xylem parenchyma and xylem fibre cells provide structural support for the tracheids.
  
• Xylem parenchyma is the only xylem tissue which is living at maturity.
• So, the correct answer is 'Xylem parenchyma'.