Which one of the following belongs to the same class?

Options

A. Mucor , Alternaria and Yeast
B. Morchella , Truffles and Saccharomyces
C. Agaricus , Rhizopus and Aspergillus
D. Rhizopus,Colletotrichum and Yeast

Answer

To solve the question of which organism belongs to the same class, we need to identify the classification of each organism provided in the options. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Classification of Fungi
Fungi are classified into four main classes:
1. Phycomycetes
2. Ascomycetes
3. Basidiomycetes
4. Deuteromycetes

### Step 2: Identify the Organisms
Now, let's look at the organisms mentioned in the options:
- Mucor
- Alternaria
- Yeast (Saccharomyces)
- Morchella
- Truffles
- Agaricus
- Rhizopus
- Aspergillus
- Colletotrichum

### Step 3: Classify Each Organism
Next, we classify each organism according to the classes of fungi:
1. **Mucor** - Phycomycetes
2. **Alternaria** - Deuteromycetes
3. **Yeast (Saccharomyces)** - Ascomycetes
4. **Morchella** - Ascomycetes
5. **Truffles** - Ascomycetes
6. **Agaricus** - Basidiomycetes
7. **Rhizopus** - Phycomycetes
8. **Aspergillus** - Ascomycetes
9. **Colletotrichum** - Deuteromycetes

### Step 4: Group the Organisms by Class
Now, we can group the organisms by their respective classes:
- **Phycomycetes**: Mucor, Rhizopus
- **Ascomycetes**: Yeast (Saccharomyces), Morchella, Truffles, Aspergillus
- **Basidiomycetes**: Agaricus
- **Deuteromycetes**: Alternaria, Colletotrichum

### Step 5: Identify the Correct Pairing
From the classifications, we can see that:
- **Ascomycetes** has multiple organisms: Yeast (Saccharomyces), Morchella, Truffles, and Aspergillus.

Thus, the organisms that belong to the same class are:
- **Morchella, Truffles, and Yeast (Saccharomyces)**, which all belong to Ascomycetes.

### Conclusion
The correct answer to the question is **option 2**, as it contains organisms that belong to the same class (Ascomycetes).

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