Resistance to jassides in cotton plants and to cereal leaf beetle in wheat plants is due to

Options

A. biochemical characters
B. physiological characters
C. morphological characters
D. none of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:** The question asks about the type of characters responsible for resistance to jassides in cotton plants and to cereal leaf beetle in wheat plants.

2. **Identifying the Resistance:** The resistance mentioned in the question refers to the ability of plants to defend themselves against specific pests, namely jassides (a type of insect) in cotton and cereal leaf beetles in wheat.

3. **Types of Plant Characters:** There are three main types of plant characters that can contribute to pest resistance:
- **Biochemical Characters:** These involve chemical compounds produced by plants that can deter pests or inhibit their growth.
- **Physiological Characters:** These relate to the internal processes and functions of the plant that may affect its growth and resistance.
- **Morphological Characters:** These refer to the physical structure and form of the plant, such as leaf shape, size, and surface texture.

4. **Analyzing the Example:** The example given in the question indicates that the resistance in cotton and wheat is due to specific structural features of the plants. The mention of "hairy leaf structure" suggests that the physical characteristics of the leaves play a significant role in providing resistance.

5. **Conclusion:** Since the resistance is attributed to the physical structure of the plants (hairy leaves), the correct answer is that the resistance to jassides in cotton plants and to cereal leaf beetles in wheat plants is due to **morphological characters**.

**Final Answer:** C. Morphological characters.

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