Question

________ is an example of secondary meristem.

• A. Xylem
• B. Phloem
• C. Phellem
• D. Cork cambium

Answer 1

Answer: (D)

Cork cambium

• The secondary meristems are responsible for secondary growth in plants.
  
• They are also known as the lateral meristems as they surround the stem of a plant and help them to grow laterally i.e, increase in the radii.
• Vascular cambium produces secondary xylem and secondary phloem.
• Cork cambium or phellogen forms a layer of cells which produces a secondary protective layer of the stem called the periderm.
• Phellem or the cork is a tissue formed to the outer side of cork cambium which is composed of dead cells and is protective in function.
• Cork cambium is a secondary meristem
• So, the correct answer is 'Cork cambium'