Which of the following is adventitious in origin

Options

A. Storage roots of Turnip
B. Nodular root of Fabaceae
C. Pillar root of banyan
D. Storage root of carrot

Answer

To determine which of the following options is adventitious in origin, we need to understand what adventitious roots are. Adventitious roots are roots that arise from an unusual place, such as stems or leaves, rather than from the primary root system. They often play a role in vegetative propagation.

Let's analyze the options provided:

1. **Storage roots of turnip**: These roots primarily serve as storage organs for nutrients and do not typically arise adventitiously. They are not involved in vegetative propagation.

2. **Nodular roots of FSA (likely referring to legumes)**: These roots are specialized for nitrogen fixation and are not adventitious in origin. They arise from the primary root system and are not used for vegetative propagation.

3. **Pillar roots of banyan**: These roots are a type of adventitious root. They grow from the branches of the banyan tree and can develop into new plants when they reach the ground, thus facilitating vegetative propagation.

4. **Storage roots of carrot**: Similar to turnips, these roots are primarily for storage and do not arise adventitiously. They are not involved in vegetative propagation.

Based on this analysis, the correct answer is the **pillar roots of banyan**, as they are adventitious in origin and can lead to the formation of new plants.

### Step-by-Step Solution:
1. Understand the definition of adventitious roots.
2. Analyze each option to determine if they are adventitious.
3. Identify that storage roots (turnip and carrot) are not adventitious.
4. Recognize that nodular roots (of FSA) are specialized for nitrogen fixation and not adventitious.
5. Conclude that pillar roots of banyan are adventitious and can lead to new plant formation.