Sieved septa/trumpet hyphae occur in

Options

A. Bryophytes
B. Red algae
C. Some complex green algae
D. Some large brown algae.

Answer

To solve the question regarding where sieved septa or trumpet hyphae occur, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Sieved Septa**: These are structures found in certain types of fungi and algae that allow for the movement of nutrients and signals between cells.
- **Trumpet Hyphae**: These are specialized hyphae that have septa with pores, facilitating the transport of materials.

2. **Analyze the Options**:
- The options given are:
- Bryophytes
- Red algae
- Some complex green algae
- Some large brown algae

3. **Evaluate Each Option**:
- **Bryophytes**: Common examples include mosses. They do not have trumpet hyphae or sieved septa.
- **Red Algae**: While they contain pigments that give them their color, they also do not have trumpet hyphae.
- **Some Complex Green Algae**: These algae perform photosynthesis and contain chlorophyll but do not have trumpet hyphae.
- **Some Large Brown Algae**: Known as kelps, these algae are characterized by the presence of trumpet hyphae which have sieved septa. They are found in marine environments and are capable of nutrient transport through these structures.

4. **Conclusion**:
- Based on the analysis, the correct answer is **some large brown algae**, commonly referred to as kelps, which contain sieved septa or trumpet hyphae.

### Final Answer:
Sieved septa/trumpet hyphae occur in **some large brown algae**.

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