Which is not an adaptive feature in plants growing in physiological dry soil

Options

A. Pneumatophore
B. Vivipary
C. Sunken stomata
D. Conducting tissue rudimentary

Explanation

To determine which feature is not an adaptive characteristic of plants growing in physiological dry soil, we need to analyze the options provided: nematophore, vivipary, sunken stomata, and rudimentary conducting tissue.

### Step-by-Step Solution:

1. **Understanding the Environment**:
- Physiological dry soil refers to soil that lacks sufficient moisture for optimal plant growth. Plants in such environments have developed specific adaptations to survive.

2. **Analyzing the Options**:
- **Nematophore**: These are specialized roots found in halophytes (plants that thrive in saline conditions, such as mangroves). They help in gaseous exchange and are not an adaptation for dry soil.
- **Vivipary**: This is a reproductive strategy where seeds germinate while still attached to the parent plant. This adaptation is beneficial in dry environments as it allows seedlings to establish in a safer environment.
- **Sunken Stomata**: These structures help reduce water loss through transpiration, making them an important adaptation for plants in dry conditions.
- **Rudimentary Conducting Tissue**: Reduced conducting tissues can be an adaptation in dry environments, as it minimizes water loss and energy expenditure.

3. **Identifying the Incorrect Option**:
- Among the options, **nematophore** is the only feature that is not an adaptive characteristic for plants in physiological dry soil. It is specifically associated with plants in saline or marshy environments.

4. **Conclusion**:
- The answer to the question is **nematophore**, as it does not serve as an adaptation for plants in dry soil.

### Final Answer:
**Nematophore is not an adaptive feature in plants growing in physiological dry soil.**

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