What is the basic reason behind more than ome type is leaves in a plants :

Options

A. Due to different grwoth rates
B. Due to lack of nutrients
C. Due to nutrients toxicity
D. Due to plasticity

Answer

### Step-by-Step Solution

1. **Understanding the Question**: The question asks for the basic reason behind the presence of more than one type of leaves in plants.

2. **Analyzing the Options**:
- **Option A**: "Due to different growth rates." This option suggests that varying growth rates lead to different types of leaves. However, this is not a valid explanation, as growth rates do not inherently change the type of leaves produced.

- **Option B**: "Due to lack of nutrients." This option implies that nutrient deficiency causes the development of different leaf types. This is incorrect because all leaves receive nutrients equally from the roots, and lack of nutrients would not create different leaf types.

- **Option C**: "Due to nutrient toxicity." This option refers to the presence of harmful levels of nutrients in the soil. While toxicity can affect plant health, it does not lead to the natural occurrence of different leaf types; rather, it may cause deformities that are not structurally different types of leaves.

- **Option D**: "Due to plasticity." This option suggests that the occurrence of different leaf types is due to plasticity. Plasticity in plants refers to their ability to adapt and produce various leaf forms based on environmental conditions or functional needs.

3. **Identifying the Correct Answer**: After analyzing all options, Option D is the correct answer. Plasticity allows plants to develop different types of leaves for various functions, such as photosynthesis, storage, and reproduction.

4. **Conclusion**: The basic reason behind the presence of more than one type of leaf in plants is due to plasticity.

### Final Answer
The basic reason behind more than one type of leaves in a plant is due to plasticity (Option D).