Monocatyledons have tap root system.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question states that "Monocatyledons have tap root system." We need to determine if this statement is true or false.

2. **Defining Monocotyledons**: Monocotyledons, or monocots, are a group of flowering plants that typically have one cotyledon (seed leaf) in their seeds. Common examples include grasses, lilies, and orchids.

3. **Root System in Monocots**: Monocots are characterized by having a fibrous root system. This means that instead of a single main root (taproot), they have many thin roots that spread out from the base of the stem.

4. **Defining Taproot System**: A taproot system is characterized by a single main root that grows vertically downward, with smaller lateral roots branching off from it. This is typical of dicotyledons (dicots), which have two cotyledons in their seeds.

5. **Conclusion**: Since monocots have a fibrous root system and not a taproot system, the statement "Monocotyledons have tap root system" is false.

**Final Answer**: The statement is false. Monocotyledons have a fibrous root system, not a taproot system.

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