Question

Sub-aerial stem modifications help the plants in:

• A. Storage of food
• B. Vegetative propagation
• C. Protection from grazing animals
• D. None of the above

Answer 1

The correct option is B Vegetative propagation

In subaerial modifications, the stem is partly aerial and partly underground. Short aerial branches and adventitious roots develop at the nodes. Detachment of entire branch or a node can develop into a new plant. The plants are commonly known as creepers and their subaerial stem modifications meant for vegetative propagation. There are four types of sub-aerial stem modifications - Runner, Stolon, Offset and Sucker. Many plants produce underground stems for perennation and food storage. They produce aerial shoots annually.