Which of the following groups of organisms are included under chrysophytes?

Options

A. Diatoms and desmids (golden algae)
B. Diatoms and dinofiagellates
C. Euglenoids
D. Slime moulds

Explanation

To answer the question "Which of the following groups of organisms are included under chrysophytes?", we will analyze the options provided and understand the characteristics of chrysophytes.

### Step-by-Step Solution:

1. **Understand Chrysophytes**: Chrysophytes are a group of protists that are primarily characterized by their ability to perform photosynthesis. They contain chlorophyll A and C, which are essential for this process.

2. **Identify Key Characteristics**: Chrysophytes are known for having a specific pigment called fucoxanthin, which gives them a yellowish-brown color. This pigment is a type of carotenoid and is crucial for their photosynthetic capabilities.

3. **Look at the Options**: The options given are:
- A) Diatoms and decimates
- B) Diatoms and dinoflagellates
- C) Euglenoids and slime molds

4. **Analyze Each Option**:
- **Option A (Diatoms and decimates)**: Diatoms are indeed chrysophytes and are known for their silica cell walls. Decimates, also known as golden algae, are another type of chrysophyte. Therefore, this option is correct.
- **Option B (Diatoms and dinoflagellates)**: While diatoms are chrysophytes, dinoflagellates belong to a different group and are not classified as chrysophytes. Hence, this option is incorrect.
- **Option C (Euglenoids and slime molds)**: Euglenoids are part of the protista kingdom but are not classified as chrysophytes. Slime molds also belong to a different category within protista. This option is incorrect.

5. **Conclusion**: Based on the analysis, the correct answer is **Option A: Diatoms and decimates**.

### Final Answer:
The group of organisms included under chrysophytes is **Diatoms and decimates**.