Excess water collects in the form of droplets around special openings of veins near the tip of grass blades and leaves of many herbaceous parts. Such water loss is known as
A. guttation
B. nutation
C. excretion
D. secretion

Options

A. A. guttation
B. B. nutation
C. C. excretion
D. D. secretion

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question describes a phenomenon where excess water collects in droplets around special openings of veins near the tips of grass blades and leaves of herbaceous plants. We need to identify what this process is called from the given options.

2. **Analyzing the Options**:
- **Option A: Guttation**: Guttation is the process of water loss in plants, which occurs due to root pressure. It typically happens at night or early morning when the soil moisture is high, and the plant roots absorb more water than the plant can use, leading to the exudation of water droplets.
- **Option B: Nutation**: Nutation refers to the bending or movement of plant parts, such as stems or leaves, and is not related to water loss.
- **Option C: Excretion**: Excretion involves the removal of waste materials from the plant, which is not the same as the loss of excess water.
- **Option D: Secretion**: Secretion involves the synthesis and release of substances needed by the plant, which does not pertain to the loss of water.

3. **Identifying the Correct Answer**: Based on the definitions and descriptions of each option, the process that describes the loss of excess water in the form of droplets is **Guttation**. Therefore, the correct answer is **Option A: Guttation**.

4. **Conclusion**: Guttation is the correct term for the phenomenon described in the question, as it specifically refers to the loss of water from the plant due to root pressure, leading to the formation of droplets.

---