Moss peristome takes part in

Options

A. Spore dispersal
B. Photosynthesis
C. Protection
D. Absorption.

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the function of the moss peristome. It provides four options: spore dispersal, photosynthesis, protection, and absorption.

2. **Identifying the Structure**: The moss peristome is a structure found in the capsule of mosses. It consists of specialized teeth that are involved in the release of spores.

3. **Function of the Peristome**: The primary function of the moss peristome is spore dispersal. The peristomial teeth play a crucial role in this process.

4. **Characteristics of Peristomial Teeth**:
- **Hygroscopic Nature**: The peristomial teeth are hygroscopic, meaning they can absorb moisture from the environment. This property helps them to move and facilitate spore release.
- **Movement**: The peristomial teeth can lengthen and shorten, which aids in the effective dispersal of spores. This movement helps to control the release of spores, allowing only a few to pass at a time.

5. **Evaluating the Options**:
- **Option 1: Spore Dispersal** - This is the correct answer as it aligns with the identified function of the moss peristome.
- **Option 2: Photosynthesis** - Incorrect, as the peristome does not participate in photosynthesis.
- **Option 3: Protection** - Incorrect, as the peristome does not primarily serve a protective function.
- **Option 4: Absorption** - Incorrect, as the peristome is not involved in the absorption of nutrients or water.

6. **Conclusion**: The moss peristome primarily takes part in spore dispersal, making option 1 the correct choice.

### Final Answer:
**Moss peristome takes part in spore dispersal.**

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