In a plant, ____________ is present in the middle lamella, primary cell and secondary walls and accumulates in the initial stages of development during cell expansion.

Correct option is D

The correct answer is (d) pectin.
• In a plant, pectin is present in the middle lamella, primary cell wall, and secondary walls and accumulates in the initial stages of development during cell expansion.
• Pectin is a polysaccharide that helps in cell adhesion and provides structural support.
Facts to remember:
• Pectin is widely used in the food industry as a gelling agent, particularly in jams and jellies.
• It plays a crucial role in plant growth and development by maintaining cell wall integrity.