Resistance against environmental stresses increases with the usage of this biofertilizer

Options

A. Glomus
B. Azolla
C. Nostoc
D. Rhizobium

Answer

### Step-by-Step Text Solution:

1. **Understanding the Question**: The question asks which biofertilizer increases resistance against environmental stresses. Environmental stresses can include factors like heat, cold, drought, and diseases.

2. **Identifying the Biofertilizer**: The focus is on a specific type of biofertilizer that is known to enhance resistance to these stresses.

3. **Recognizing the Organism**: The organism in question is a type of fungus known as **Glomus**. Glomus is a genus of mycorrhizal fungi that forms symbiotic relationships with plant roots.

4. **Understanding Mycorrhiza**: Mycorrhiza refers to the symbiotic association between fungi and plant roots. In this association, the fungus (Glomus) helps the plant absorb water and nutrients more effectively, while the plant provides carbohydrates to the fungus.

5. **Benefits of Glomus**: The use of Glomus as a biofertilizer has been shown to increase the plant's resistance to environmental stresses such as drought and diseases. This is due to improved nutrient uptake and enhanced root development.

6. **Conclusion**: Based on the characteristics of Glomus and its role as a biofertilizer, we conclude that the correct answer to the question is **Glomus**.

### Final Answer:
The biofertilizer that increases resistance against environmental stresses is **Glomus**.

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