A root system with large, central and dominant root is

Options

A. tap root
B. fibrous root
C. adventitious root
D. None of these

Answer

To answer the question "A root system with large, central and dominant root is:", we need to analyze the options provided:

1. **Taproot**
2. **Fibrous root**
3. **Adventitious root**
4. **None of these**

### Step-by-Step Solution:

**Step 1: Understand the Types of Root Systems**
- A taproot system consists of one main root that grows deeper into the soil, with smaller lateral roots branching off from it. This central root is typically larger and more dominant than the others.
- A fibrous root system, on the other hand, consists of many thin roots that spread out horizontally from the base of the plant. This type does not have a single dominant root.
- Adventitious roots can arise from unusual places, such as stems or leaves, and do not form a central dominant root.

**Step 2: Identify Characteristics of Taproot**
- Taproots grow vertically downward and are known for their dominance in the root system. Examples include carrots, sugar beets, and beetroots, which all have a large central root.

**Step 3: Compare with Other Root Types**
- Fibrous roots, like those of a banana tree, spread out horizontally and do not have a single dominant root.
- Adventitious roots do not form a central root system either.

**Step 4: Conclusion**
- Since the question specifies a root system with a large, central, and dominant root, the correct answer is **A) Taproot**.

### Final Answer:
**A) Taproot**

---