Which orientation or movement occurs in rhizome and runner

Options

A. Ageotropic
B. Negatively geotropic
C. Diageotropic
D. Phagotropic

Answer

To determine the orientation or movement that occurs in rhizomes and runners, we can follow these steps:

### Step-by-Step Solution:

1. **Define Rhizome and Runner**:
- A rhizome is a type of underground stem that grows horizontally. It develops from auxiliary buds.
- A runner is a stem that also grows horizontally along the ground.

2. **Understand Growth Direction**:
- Both rhizomes and runners grow in a horizontal direction. This means they do not grow vertically upward or downward.

3. **Analyze the Options**:
- The options provided are:
1. Azeotropic
2. Negative geotropic
3. Digeotropic
4. Phagotropic

4. **Evaluate Each Option**:
- **Azeotropic**: This term does not relate to plant growth orientation and can be eliminated.
- **Negative Geotropic**: This refers to growth against gravity (upward), which does not apply to rhizomes and runners since they grow horizontally. Thus, this option can be eliminated.
- **Digeotropic**: This term refers to growth that occurs at a right angle to the direction of gravity. Since rhizomes and runners grow horizontally, they can be considered to exhibit digeotropic growth.
- **Phagotropic**: This term is not relevant to the context of plant growth orientation and can be eliminated.

5. **Conclusion**:
- The correct orientation or movement that occurs in rhizomes and runners is **digeotropic** growth.

### Final Answer:
The orientation or movement that occurs in rhizomes and runners is **digeotropic**.

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