Deficiency symptoms of readily mobilised essential elements will first appear in_____

Options

A. younger tissues
B. older tissues
C. roots
D. shoots

Explanation

To answer the question regarding where deficiency symptoms of readily mobilized essential elements will first appear, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Readily Mobilized Elements**:
- Readily mobilized essential elements in plants include nitrogen, phosphorus, potassium, and sulfur. These elements can be moved easily within the plant tissues.

2. **Identifying Plant Tissues**:
- In plants, tissues can be categorized as young (newer) and old (older). Young tissues are typically the newer leaves and shoots, while older tissues are the older leaves and stems.

3. **Deficiency Symptoms**:
- When a plant experiences a deficiency in essential elements, the symptoms of this deficiency will manifest in a specific order based on the mobility of these nutrients.

4. **Priority of Nutrient Distribution**:
- Plants prioritize the distribution of essential nutrients to younger tissues over older tissues. This means that if there is a deficiency, the plant will first ensure that the younger parts receive the necessary nutrients to support growth and development.

5. **Conclusion**:
- Therefore, the deficiency symptoms of readily mobilized essential elements will first appear in **younger tissues** of the plant.

### Final Answer:
The deficiency symptoms of readily mobilized essential elements will first appear in **younger tissues**.

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