Primary and secondary roots are present in fibrous root system.

Explanation

To address the question regarding the presence of primary and secondary roots in a fibrous root system, we can break down the answer into several steps:

### Step-by-Step Solution:

1. **Understanding Root Systems**:
- There are two main types of root systems in plants: fibrous root systems and taproot systems.

2. **Defining Fibrous Root System**:
- A fibrous root system is characterized by a network of many thin roots that spread out from the base of the plant.

3. **Identifying Primary Roots**:
- In a fibrous root system, the primary root is not as prominent as in a taproot system. Instead, the primary root is usually short-lived and gives rise to many secondary roots.

4. **Identifying Secondary Roots**:
- Secondary roots, also known as lateral roots, emerge from the primary root and spread outwards. In a fibrous root system, these secondary roots are numerous and form a dense network.

5. **Conclusion**:
- Therefore, while fibrous root systems do contain primary and secondary roots, the primary root is less significant and is quickly replaced by a multitude of secondary roots that help in anchoring the plant and absorbing nutrients and water.

### Final Answer:
In a fibrous root system, both primary and secondary roots are present, but the primary root is less prominent, and the system is characterized by a dense network of secondary roots.

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