Chrysophytes are :-

Options

A. Diatoms & Desmids
B. Diatoms & Dinoflagellale
C. Slime mould & Desmids
D. Slime mould & Diatoms

Answer

### Step-by-Step Solution:

1. **Understanding Chrysophytes**: Chrysophytes belong to the kingdom Protista, which includes all single-celled eukaryotes. They are primarily characterized by their golden yellowish color.

2. **Identifying Members of Chrysophytes**: The main members of chrysophytes include diatoms and desmids. Both of these are unicellular organisms, meaning they consist of a single cell.

3. **Characteristics of Diatoms**: Diatoms are a significant group within chrysophytes. They are known as the chief producers in ocean ecosystems due to their ability to perform photosynthesis, contributing to biomass production.

4. **Physical Features of Diatoms**: Diatoms are microscopic and free-swimming organisms. They move passively with water currents. Their cell walls are made of silica, which is a hard and durable substance, and their cells overlap like soapboxes.

5. **Conclusion**: Based on the characteristics and members identified, chrysophytes are primarily represented by diatoms and desmids.

### Final Answer:
Chrysophytes are primarily represented by diatoms and desmids.

---