NEET BIOLOGY

Detailed explanation-1: -Assertion :Apical and intercalary meristems contribute to the growth in length while the lateral meristems bring increase in girth in maize. Reason: Apical and intercalary meristems always increase the height of plants.

Detailed explanation-2: -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.

Detailed explanation-3: -Apical meristem is present at the tips of growing roots and shoots. It increases the length of roots and shoots.

Detailed explanation-4: -The key to plant growth is meristem, a type of plant tissue consisting of undifferentiated cells that can continue to divide and differentiate. Meristem allows plant stems and roots to grow longer (primary growth) and wider (secondary growth).