Which one of the following has tuberous adventitious roots?

Options

A. Dahlia
B. Raddish
C. Carrot
D. Beet

Explanation

To determine which of the given options has tuberous adventitious roots, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Root Types**:
- There are three main types of root systems: taproot, fibrous root, and adventitious root.
- Taproots develop from the radical and persist, while fibrous roots replace the primary root with fine roots from the base of the stem.

2. **Define Adventitious Roots**:
- Adventitious roots are those that develop from parts of the plant other than the radical (the embryonic root). They can arise from stems or leaves.

3. **Identify Types of Adventitious Roots**:
- Adventitious roots can be modified for various purposes, including storage of food. Two subtypes of fleshy adventitious roots are:
- Tuberous roots (single root tubers).
- Fasciculated roots (clustered tuberous roots).

4. **Examine the Options**:
- A) Dahlia
- B) Radish
- C) Carrot
- D) Beet

5. **Analyze Each Option**:
- **Dahlia**: Known to have tuberous adventitious roots, specifically fasciculated tuberous roots that store food.
- **Radish**: A taproot with a fleshy modification (fusiform).
- **Carrot**: A taproot with a conical shape.
- **Beet**: A taproot with a nepi form.

6. **Conclusion**:
- The only option that has tuberous adventitious roots is **Dahlia**.

### Final Answer:
The correct answer is **A) Dahlia**.

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