AP BIOLOGY

Detailed explanation-1: -Unlimited Growth-The root and the shoot system of plants grow continuously from germination stage to the death or throughout the life span of the plant. It is called ‘Unlimited’ or ‘indeterminate’ type of growth. Limited growth-The leaves, fruits and flowers stop growing after attaining certain size.

Detailed explanation-2: -Plants possess different stages of growth and development at any point of time, due to its capacity for unlimited growth. This unique ability of plants, is due to the presence of special cells that have the capacity to divide and self-perpetuate called meristems.

Detailed explanation-3: -The growth curve of perennial plant is a series of small sigmoid-curved. A series of sigmoid represents one year of growth. Growth curves are influenced by seasons. During the summer, the rate of growth is high, and during the winter, it is low.

Detailed explanation-4: -Reasons for indefinite growth: Growth in plants is indefinite because they have the capacity for unlimited growth throughout their life. This ability is due to the presence of meristems at certain locations.