Columella is a specialized structure found in the sporangium of

Options

A. Spirogyra
B. Ulothrix
C. Rhizopus
D. Penicillium

Answer

To answer the question regarding the specialized structure known as columella found in the sporangium, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Columella**:
- Columella is a specialized structure that is found at the tip of the sporangiophore. It plays a crucial role in the development of spores.

2. **Identifying Sporangiophore**:
- The sporangiophore is a specialized branch that bears the sporangia. It is important to note that the columella is located at the top of this structure.

3. **Function of Columella**:
- The columella is a sterile structure that supports the sporangium. It acts as a link between the active protoplasm below and the developing spores within the sporangial head.

4. **Nutrient Transfer**:
- The columella facilitates the transfer of nutrients from the active protoplasm to the developing spores, ensuring their growth and development.

5. **Identifying the Organism**:
- The question asks which organism contains columella in its sporangium. In this case, columella is specifically found in the sporangium of **Rhizopus**, a type of fungus.

6. **Conclusion**:
- Based on the information gathered, we can conclude that the correct answer to the question is **Rhizopus**.

### Final Answer:
Columella is a specialized structure found in the sporangium of **Rhizopus**.

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