Lichens are the associations of

Options

A. Bacteria ad fungus
B. Algae and bacterium
C. Fungus and algae
D. Fungus and virus

Answer

**Step-by-Step Solution:**

1. **Understanding Lichens**: Lichens are unique organisms that form through a symbiotic relationship between two different types of organisms.

2. **Identifying the Organisms**: The two main components of lichens are:
- **Mycobiont**: This is the fungal partner in the association. It typically belongs to the kingdom Fungi, specifically a subgroup called Ascomycetes.
- **Phycobiont**: This is the algal partner, which is usually a green alga.

3. **Function of Each Partner**:
- The **Mycobiont** (fungus) provides structure, support, and absorbs minerals and water from the environment.
- The **Phycobiont** (alga) performs photosynthesis, producing food that sustains both partners.

4. **Mutual Benefit**: The relationship is mutualistic, meaning both organisms benefit from each other. The fungus provides a habitat and nutrients, while the alga contributes food through photosynthesis.

5. **Conclusion**: Based on the above points, the correct answer to the question "Lichens are the associations of" is **fungus and algae**.

**Final Answer**: Lichens are the associations of **fungus and algae**.

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