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 fungi listed grow on moist, decaying wood, we need to analyze each fungus based on their classification and habitat preferences.

### Step-by-Step Solution:

1. **Identify the Fungi in the List**:
The fungi mentioned are:
- Rhizopus
- Aspergillus
- Trichoderma
- Ustilago
- Albugo
- Alternaria
- Mucor
- Agaricus

2. **Classify Each Fungus**:
- **Rhizopus**: This is a member of the Phycomycetes class and is known to grow on decaying organic matter, including moist wood.
- **Aspergillus**: This belongs to the Ascomycetes class and typically grows on decaying organic matter but is not specifically known for growing on moist wood.
- **Trichoderma**: This is a member of the Deuteromycetes class and is often found on decaying wood and soil.
- **Ustilago**: This is a type of smut fungus (Basidiomycetes) and primarily affects plants, not wood.
- **Albugo**: This is a parasitic fungus that affects mustard plants, not decaying wood.
- **Alternaria**: This is a Deuteromycetes fungus that usually grows on decaying plant material but not specifically on wood.
- **Mucor**: This is also a member of the Phycomycetes class and is known to grow on decaying organic matter, including moist wood.
- **Agaricus**: This is a mushroom (Basidiomycetes) and typically grows in soil or compost, not specifically on decaying wood.

3. **Determine Which Fungi Grow on Moist, Decaying Wood**:
From the analysis:
- **Rhizopus**: Yes
- **Trichoderma**: Yes
- **Mucor**: Yes
- **Aspergillus**: No
- **Ustilago**: No
- **Albugo**: No
- **Alternaria**: No
- **Agaricus**: No

4. **Count the Fungi That Fit the Criteria**:
The fungi that grow on moist, decaying wood are:
- Rhizopus
- Trichoderma
- Mucor

Therefore, there are **3 fungi** from the list that are known to grow on moist, decaying wood.

### Final Answer:
**3 fungi** (Rhizopus, Trichoderma, Mucor) are known to grow on moist, decaying wood.

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