Assertion: Plants absorb calcium from soil in the form of calcium ions `(Ca^(2+))`
Reason: Calcium is required by meristematic and differentiating tissues.

Options

A. If both assertio and reason are true and reason is the correct explanation of assertion
B. if both assertion and reason are true but reason is not the correct explanation of assertion
C. if assertion is true but reason is false
D. if both assertion and reason are false

Explanation

To analyze the assertion and reason provided in the question, we will break down the information step by step.

### Step-by-Step Solution:

1. **Understanding the Assertion:**
- The assertion states that "Plants absorb calcium from soil in the form of calcium ions (Ca²⁺)."
- This statement is true. Plants do absorb calcium primarily as calcium ions from the soil solution.

2. **Understanding the Reason:**
- The reason states that "Calcium is required by meristematic and differentiating tissues."
- This statement is also true. Calcium plays a crucial role in the growth and development of plants, particularly in meristematic tissues (which are responsible for growth) and differentiating tissues (which are involved in the specialization of cells).

3. **Exploring the Role of Calcium:**
- Calcium is essential for several physiological processes in plants:
- It is involved in the formation of calcium pectate, which is a component of the middle lamina in cell walls, providing structural stability.
- Calcium is necessary for the formation of spindle fibers during cell division (mitosis), which is critical for proper cell division.
- It acts as a secondary messenger in various metabolic pathways and is essential for enzyme activity.

4. **Conclusion:**
- Both the assertion and the reason are true statements. However, the assertion alone does not fully encompass the importance of calcium in plant physiology, as it does not mention its specific roles in cell division and metabolic activities.
- Therefore, while both statements are correct, the assertion is not well-defined in the context of the reason provided.

### Final Answer:
- The correct option is **B**: The assertion is true, but the reason is not a correct explanation of the assertion.