The timing of seasonal activity of plants in relation to change in environmental conditions is termed as

Options

A. Physiognomy
B. Phenology
C. Stratification
D. Agrostology

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term that describes the timing of seasonal activities of plants in relation to environmental changes.

2. **Analyzing the Options**: We have four options to consider:
- A) Physiognomy
- B) Phenology
- C) Stratification
- D) Agrostrology

3. **Defining Each Option**:
- **A) Physiognomy**: This term refers to the physical appearance or characteristics of an organism, often related to human features, and is not relevant to plant seasonal activities.
- **B) Phenology**: This term refers to the study of periodic events in biological life cycles, particularly how these events are influenced by seasonal and climatic changes. This directly relates to the timing of seasonal activities of plants.
- **C) Stratification**: This term refers to the vertical layering of habitats or vegetation, which does not pertain to the timing of seasonal activities.
- **D) Agrostrology**: This is the study of grasses and does not relate to the timing of seasonal activities in plants.

4. **Identifying the Correct Answer**: Based on the definitions, the term that best fits the description of the timing of seasonal activity of plants in relation to environmental conditions is **Phenology**.

5. **Conclusion**: Therefore, the correct answer to the question is **B) Phenology**.

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