Guttation is form

Options

A. Uninjured edges of leaves near vein endings
B. Epidermal layers of leaf surfaces
C. Injured edges of leaves
D. None of the above

Answer

**Step-by-Step Solution:**

1. **Understanding Guttation**: Guttation is the process by which water is exuded from the edges of leaves in the form of droplets. This occurs primarily during the night or early morning when transpiration is low due to high humidity.

2. **Identifying the Location**: Guttation typically occurs at the uninjured edges of leaves, particularly near the vein endings. This is where specialized structures called hydathodes are located, which facilitate the release of water.

3. **Conditions for Guttation**: Guttation is favored under conditions of high soil moisture and when transpiration is suppressed. This leads to increased root pressure, causing water to be pushed out through the hydathodes.

4. **Evaluating the Options**:
- **Option A**: Uninjured edges of leaves near vein endings - This aligns with the definition of guttation.
- **Option B**: Epidermal layers of leaf surfaces - This does not specifically refer to guttation.
- **Option C**: Injured edges of leaves - This is not correct as guttation occurs at uninjured edges.
- **Option D**: None of the above - This is incorrect since option A is valid.

5. **Conclusion**: Based on the understanding of guttation and the evaluation of the options, the correct answer is **Option A: Uninjured edges of leaves near vein endings**.

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