Question

Leaf primordium grows by

• A. Apical meristem
• B. Intercalary meristem
• C. Mass meristem
• D. Both A and B

Answer 1

The correct option is A Apical meristem

• There are three types of meristems in plants, the apical meristem, the intercalary meristem and the lateral meristem.
• Leaves are formed by the shoot apical meristem (SAM).
• The SAM swells to form the leaf primordium (undifferentiated tissue) which divides to form the leaf blades and the leaf sheaths.
• The leaf blades undergo cell division and get elongated.
• The flattened blade is formed by the marginal meristem present at the margins of the leaf axis.
• Meristem present on the sides increases the girth of the plant and is called lateral meristem (no role in leaf formation).
  
• So, the correct answer is 'Apical meristem'.