Resistance to jassids in cotton and cereal leaf beetles in wheat is due to which of the following morphological characterstics ?

Options

A. Solid stem
B. Hairy leaves
C. Nectarless nature
D. Both A and B

Answer

To solve the question regarding the resistance to jassids in cotton and cereal leaf beetles in wheat, we need to analyze the morphological characteristics that contribute to this resistance.

### Step-by-Step Solution:

1. **Understanding the Organisms**:
- Jassids are sap-sucking insects that can damage cotton plants.
- Cereal leaf beetles are pests that affect wheat crops.

2. **Identifying Morphological Characteristics**:
- The question provides several options:
- A) Solid stem
- B) Hairy leaf
- C) Nectarless nature
- D) Both A and B

3. **Analyzing Each Option**:
- **Solid Stem**: While a solid stem may provide some structural integrity, it is not specifically known for resistance to pests like jassids or cereal leaf beetles.
- **Hairy Leaf**: Hairy leaves are known to provide a physical barrier to pests. The hairs can deter insects from feeding and can also reduce the ability of pests to lay eggs on the plant.
- **Nectarless Nature**: This characteristic might reduce attraction to certain insects but does not directly correlate with resistance to jassids or beetles.
- **Both A and B**: This option suggests that both solid stems and hairy leaves contribute to resistance.

4. **Conclusion**:
- The most relevant morphological characteristic that provides resistance to jassids in cotton and cereal leaf beetles in wheat is the **hairy leaf**. Therefore, the correct answer is **B) Hairy leaf**.

### Final Answer:
The resistance to jassids in cotton and cereal leaf beetles in wheat is due to **hairy leaves**.

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