Moss protonema can be differentiated from filamentous alga in

Options

A. Long rhizoids
B. Coenocytic nature
C. Oblique septa
D. Absence of chloroplasts.

Answer

To differentiate moss protonema from filamentous algae, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Protonema**:
- Protonema is the initial stage in the life cycle of mosses, consisting of a thread-like chain of cells. It is crucial to recognize that this structure is specific to mosses and is part of their gametophyte development.

2. **Evaluating the Options**:
- **Option 1: Long Rhizoids**:
- Rhizoids are root-like structures that anchor the gametophyte. However, they develop only on the mature gametophyte of mosses and are not present on the protonema itself. Thus, this option is incorrect.

- **Option 2: Sinusitic Nature**:
- Sinocytic (or syncytial) nature refers to a structure with multiple nuclei, typically found in certain algae and fungi. Moss protonema does not exhibit this characteristic, making this option incorrect as well.

- **Option 3: Oblique Septa**:
- The protonema of mosses is characterized by brown-walled cells that are separated by oblique septa. This is a distinct feature that differentiates it from filamentous algae, which do not have such septa. Therefore, this option is correct.

- **Option 4: Absence of Chloroplasts**:
- Both moss protonema and filamentous algae contain chloroplasts, which are essential for photosynthesis. Hence, this option cannot be used for differentiation.

3. **Conclusion**:
- After evaluating all the options, the correct way to differentiate moss protonema from filamentous algae is through the presence of oblique septa in the protonema of mosses.

### Final Answer:
Moss protonema can be differentiated from filamentous algae in having oblique septa.

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