Which is a modification of root that does ot store food?

Options

A. Napiform root
B. Fusiform root
C. Tuberous root
D. Stilt root

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: We need to identify a type of root modification that does not store food. The options provided are: napiform root, fusiform root, tuberous root, and stilt root.

2. **Analyzing Each Option**:
- **Napiform Root**: This is a modified taproot that is swollen at the base and tapers sharply towards the apex. It is primarily used for food storage, as seen in examples like beet and turnip. Therefore, it does store food and is not the correct answer.

- **Fusiform Root**: This is another type of modified taproot that is swollen in the middle and tapers at both ends. It also serves the purpose of food storage, with radish being a common example. Thus, it also stores food and is not the correct answer.

- **Tuberous Root**: Similar to the previous two, this is a modified taproot that stores food in a tuber form. An example is Mirabilis Jalapa. Since it stores food, it is also not the correct answer.

- **Stilt Root**: This is a modified adventitious root that arises from the basal nodes of the stem. Its primary function is to provide support to the plant rather than to store food. Therefore, it does not serve the purpose of food storage.

3. **Conclusion**: Based on the analysis, the only root modification that does not store food is the **stilt root**. Thus, the correct answer is **Option D: Stilt Root**.

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