CHILD DEVELOPMENT PEDAGOGY

Detailed explanation-1: -The key to continued growth and repair of plant cells is meristem. Meristem is a type of plant tissue consisting of undifferentiated cells that can continue to divide and differentiate. Like other multicellular organisms, plants grow through a combination of cell growth and cell division.

Detailed explanation-2: -Meristems at the tips of roots provide a constant supply of new cells allowing roots to grow longer. Meristems at the tips of shoots allow a plant to keep growing taller and spread wider. Meristems between the xylem and phloem increase the width of a plant. These result in the annual growth rings in trees.

Detailed explanation-3: -(iv) The form of growth wherein new cells are always being added to the plant body by the activity of the meristem, is called the open form of growth.

Detailed explanation-4: -The process of mitosis generates new cells that are genetically identical to each other. Mitosis helps organisms grow in size and repair damaged tissue.

Detailed explanation-5: -Lateral Meristems are observed in stems and roots of the plant body. Lateral meristem stimulates the increase in the girth of stem and root. It increases the lateral thickness of the plant stem and root. Hence, lateral meristem helps in increasing the girth.