In plants a common symptom caused by deficiencies of Ca, K, Mg and P is the

Options

A. appearance of a dead necrotic area
B. poor development of vasculature
C. bending of the leaf tip
D. formation of carotenes in plenty

Answer

To answer the question regarding the common symptoms caused by deficiencies of calcium (Ca), potassium (K), magnesium (Mg), and phosphorus (P) in plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Nutrient Functions**:
- Calcium is essential for cell wall structure and stability.
- Potassium is crucial for osmoregulation and enzyme activation.
- Magnesium is a central component of chlorophyll and is important for photosynthesis.
- Phosphorus is vital for energy transfer and nucleic acid synthesis.

2. **Identifying Common Symptoms**:
- Deficiencies in these nutrients often lead to similar symptoms in plants. These can include:
- Necrosis (death of tissue)
- Stunted growth
- Curling of leaves
- Poor development of vascular tissues

3. **Analyzing the Options**:
- **Adherence of dead necrotic area**: This option refers to the presence of dead tissue, which is a common symptom of nutrient deficiencies.
- **Poor development of vasculature**: While this can occur, it is not as directly associated with the deficiencies of these specific nutrients.
- **Bending of leaf tip**: This can occur but is not the most common symptom associated with the deficiencies listed.
- **Formation of keratin palliative**: This option is not relevant to plant biology, as keratin is a protein found in animals.

4. **Selecting the Correct Answer**:
- Based on the analysis, the most common symptom associated with deficiencies of calcium, potassium, magnesium, and phosphorus is the presence of dead necrotic areas in the plant.

### Final Answer:
The common symptom caused by deficiencies of Ca, K, Mg, and P in plants is the **adherence of dead necrotic area**.

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