Callose pluge are chemically ______ and are formed to block the passage between sieves during autumn season .

Options

A. Carbohydrates
B. Fatty acid derivatives
C. Proteins
D. Neutral fats

Answer

To answer the question about callose plugs, let's break it down step by step.

### Step-by-Step Solution:

1. **Understanding Callose Plugs**: Callose plugs are structures that form in the sieve tubes of plants. They play a crucial role in blocking the flow of sap between sieve elements, particularly during certain seasons.

2. **Chemical Composition**: Callose is a type of polysaccharide. Polysaccharides are long chains of sugar molecules, and in the case of callose, it is primarily composed of glucose units.

3. **Formation During Autumn**: Callose plugs are formed in response to environmental changes, particularly during the autumn season when the plant's growth slows down and it prepares for winter. This is a protective mechanism to prevent loss of nutrients and maintain the integrity of the plant.

4. **Conclusion**: Given that callose is primarily made up of glucose and is classified as a type of carbohydrate, we can conclude that the answer to the question is that callose plugs are chemically **carbohydrates**.

### Final Answer:
Callose plugs are chemically **carbohydrates**.

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