How of the following fungi given in the list are known to grow on moist , decaying wood ? Rhizopus , Aspergillus, Trichoderma , Ustilago Albugo , Alternaria, Mucor , Agaricus

Options

A. Three
B. Four
C. Five
D. Six

Answer

To determine how many of the listed fungi grow on moist, decaying wood, we can analyze each fungus based on their known habitats and characteristics.

### Step-by-Step Solution:

1. **Understand the Question**: We need to identify which fungi from the list are known to thrive on moist, decaying wood.

2. **List of Fungi**: The fungi provided are:
- Rhizopus
- Aspergillus
- Trichoderma
- Ustilago
- Albugo
- Alternaria
- Mucor
- Agaricus

3. **Identify Fungal Groups**: Fungi can be classified into different groups. The ones that typically grow on moist and decaying wood belong to the group called Phycomycetes.

4. **Analyze Each Fungus**:
- **Rhizopus**: This is a type of mold that commonly grows on decaying organic matter, including moist wood.
- **Aspergillus**: Generally found in soil and decaying vegetation, but not specifically on decaying wood.
- **Trichoderma**: This fungus is often found in soil and decaying plant material, but not specifically on decaying wood.
- **Ustilago**: This is a genus of smut fungi that typically infects grasses and is not associated with decaying wood.
- **Albugo**: This is a genus of fungi that are typically plant pathogens, not known for growing on decaying wood.
- **Alternaria**: This fungus is commonly found on decaying plant material but not specifically on wood.
- **Mucor**: Similar to Rhizopus, Mucor is a mold that can grow on decaying organic matter, including moist wood.
- **Agaricus**: This is a genus of mushrooms that typically grow in soil or on decaying plant matter, not specifically on wood.

5. **Conclusion**: From the analysis, the fungi that are known to grow on moist, decaying wood are:
- Rhizopus
- Mucor

Thus, we have identified 2 fungi that fit the criteria. However, if we consider the question's phrasing and the video transcript, it mentions Albugo as well, which might be a misunderstanding since Albugo does not typically grow on wood.

6. **Final Count**: Based on the correct identification, the fungi that grow on moist, decaying wood are Rhizopus and Mucor. Therefore, the answer is 2.

### Answer: 2 fungi (Rhizopus and Mucor)