Question

Companion cells are closely related to

• A. Guard cells
• B. Trichomes
• C. Vessel elements
• D. Sieve elements

Answer 1

Answer:

D. Sieve elements

• Companion cell is a thin walled elongated cell which is associated with sieve tube.

• The sieve tube elements lack nucleus, they remain living, being dependents upon the adjacent companion cell nucleus.

• Phloem is the food conducting tissue of plants, it consists of four type of cell.

  (i) Phloem parenchyma

  (ii) Phloem fibre

  (iii) Sieve tube elements

  (iv) Companion cell.