AP 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: -Apical meristem is present at the tip of root and shoot. Cells of apical meristem divide and give rise to new cells. This process increases the length of root and shoot.

Detailed explanation-3: -Apical meristem is responsible for increase in length of the plant.

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).