VAM is a

Options

A. Bioinsecticide
B. Bioherbicide
C. Endomycorrhiza
D. Ectomycorrhiza

Answer

To solve the question "VAM is a," we need to analyze the options provided and understand what VAM stands for and its significance in biology.

### Step-by-Step Solution:

1. **Identify the Full Form of VAM**:
- VAM stands for Vascular Arbuscular Mycorrhizae.
- This is a type of mycorrhizal association between fungi and vascular plants.

2. **Understand Mycorrhizae**:
- Mycorrhizae are symbiotic associations between fungi and plant roots.
- They play a crucial role in enhancing nutrient absorption for the plants.

3. **Differentiate Between Types of Mycorrhizae**:
- There are two main types of mycorrhizae:
- **Ectomycorrhizae**: These fungi form a sheath around the roots and do not penetrate the root cells.
- **Endomycorrhizae**: These fungi penetrate the root cells and form structures called arbuscules and vesicles within the cells.

4. **Classify VAM**:
- Since VAM (Vascular Arbuscular Mycorrhizae) involves the penetration of fungal hyphae into the root cells of vascular plants, it is classified as **endomycorrhizae**.

5. **Evaluate the Options**:
- The options given were:
- Bio insecticide
- Bio herbicide
- Endomycorrhiza
- Ectomycorrhiza
- Based on our understanding, VAM is not a bio insecticide or bio herbicide, as it does not serve as a pest control agent.
- The correct classification for VAM is **endomycorrhiza**.

### Final Answer:
VAM is an **endomycorrhiza**.

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