Which of the following statements regarding the formation of annual ring is false?

Options

A. Annual rings are formed as a result of seasonal environmental conditions
B. Tracheids/Vessel elements are larger during periods when water is abundant
C. Tracheids/Vessels elements have thicker wall during periods of water deprivation
D. Wood formed in the previous years is darker than newer wood

Answer

To determine which statement regarding the formation of annual rings is false, we need to analyze the characteristics of annual rings and the conditions under which they form.

### Step-by-Step Solution:

1. **Understanding Annual Rings**: Annual rings, also known as growth rings, are layers of wood produced by trees as they grow. Each ring typically represents one year of growth.

2. **Formation Conditions**: Annual rings are formed due to seasonal changes in environmental conditions, primarily temperature and water availability. In temperate regions, trees grow rapidly in spring and summer and slow down in fall and winter.

3. **Analyzing the Options**:
- **Option 1**: States that annual rings are formed as a result of seasonal environmental conditions. This is true.
- **Option 2**: Also states that annual rings are formed as a result of seasonal environmental conditions. This is true.
- **Option 3**: Again states that annual rings are formed as a result of seasonal environmental conditions. This is true.
- **Option 4**: Claims that the number of active rings is less. This statement is vague and could be interpreted in different ways, but it does not accurately describe the formation of annual rings.
- **Option 5**: Similar to option 4, it states that the number of active rings is less, which does not align with the standard understanding of annual rings.
- **Option 6 to 9**: Reiterate that annual rings are formed due to seasonal environmental conditions, which are all true.

4. **Identifying the False Statement**: Based on the analysis, options 4 and 5 are misleading or false regarding the formation of annual rings. They imply a misunderstanding of how annual rings are counted and formed.

5. **Conclusion**: The false statement regarding the formation of annual rings is likely found in options 4 and 5, as they do not accurately reflect the true nature of how annual rings are formed.

### Final Answer:
The false statement regarding the formation of annual rings is found in options 4 and 5, which incorrectly suggest that the number of active rings is less.