Which of the following unicellular algae reproduce by auxospores, have silicified cell wall and store food in the form of fats, leucosine and chrysolaminarin ?

Options

A. Diatoms
B. Red Algae
C. Dinoflagellates
D. Euglenoids

Answer

To solve the question regarding which unicellular algae reproduce by auxospores, have silicified cell walls, and store food in the form of fats, leucosine, and chrysolaminarin, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Characteristics**:
- The question specifies unicellular algae that reproduce by auxospores, have silicified cell walls, and store food in the form of fats, leucosine, and chrysolaminarin.

2. **Understand Auxospores**:
- Auxospores are a type of reproductive structure found in certain algae, particularly diatoms. They are formed during sexual reproduction and help in restoring the size of the diatom after it has undergone a series of divisions that reduce its size.

3. **Silicified Cell Walls**:
- Diatoms are known for their unique cell walls made of silica (SiO2), which gives them a glass-like appearance. This characteristic is crucial for identifying the correct group of algae.

4. **Food Storage**:
- Diatoms store energy primarily in the form of oils and other substances like chrysolaminarin. Chrysolaminarin is a carbohydrate storage product found in some algae, including diatoms.

5. **Conclusion**:
- Based on the characteristics mentioned (auxospores, silicified cell walls, and specific food storage), the correct answer is **Diatoms**.

### Final Answer:
The unicellular algae that reproduce by auxospores, have silicified cell walls, and store food in the form of fats, leucosine, and chrysolaminarin are **Diatoms**.

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