Which of the following is not a part of root system?

Options

A. Root cap
B. Node
C. Root hair
D. Meristematic zone

Explanation

To determine which of the following is not a part of the root system, we need to analyze each option provided:

1. **Root Cap**: This is a protective structure at the tip of the root that helps in the growth of the root by protecting the meristematic tissue as it pushes through the soil. It is indeed a part of the root system.

2. **Node**: A node is a part of the stem where leaves and branches arise. It is not involved in the root system. Therefore, this is the option that does not belong to the root system.

3. **Root Hair**: These are tiny hair-like structures that emerge from the root's epidermis and are responsible for the absorption of water and nutrients. They are part of the root system.

4. **Meristematic Zone**: This is the region of active cell division in the root, allowing for growth. It is also a part of the root system.

Based on this analysis, the correct answer is:

**Node** is not a part of the root system.