GENERAL KNOWLEDGE

Detailed explanation-1: -Lateral meristem is responsible for the increase in the girth of the stem. It is found beneath the bark (called cork cambium) and in vascular bundles of dicot roots and stems (called vascular cambium) as thin layers. It is composed of such initials which divide mainly in one plane and increases the girth of the stem.

Detailed explanation-2: -Complete answer: Stem girth increases due to lateral meristematic tissues.

Detailed explanation-3: -Complete answer: The girth of the stem or root increases because of ‘Cambium’. Cambiums are the lateral meristems that participate in the secondary growth of dicots.

Detailed explanation-4: -The intercalary meristem is responsible for the increase in girth of the plant.