Which of group includes diatoms and golden algae ?

Options

A. Dinoflagellates
B. Chrysophytes
C. Euglenoids
D. Slime moulds

Answer

To determine which group includes diatoms and golden algae, we can analyze the options provided:

1. **Option A: Dinoflagellates**
- Dinoflagellates are primarily marine plankton and are characterized by having two flagella. They do not include diatoms or golden algae. Therefore, this option is incorrect.

2. **Option B: Chrysophytes**
- Chrysophytes belong to the kingdom Protista and are found in both freshwater and marine environments. They are known to include diatoms and golden algae. Thus, this option is correct.

3. **Option C: Euglenoids**
- Euglenoids are unicellular organisms found in freshwater. They also possess two flagella but do not include diatoms or golden algae. Hence, this option is incorrect.

4. **Option D: Slime molds**
- Slime molds are isogamous organisms, meaning their sex cells are of the same size. They do not include diatoms or golden algae. Therefore, this option is also incorrect.

Based on the analysis, the correct answer is **Option B: Chrysophytes**, as they include both diatoms and golden algae.

### Step-by-Step Solution:
1. Identify the characteristics of each option.
2. Analyze whether each group contains diatoms and golden algae.
3. Conclude that only Chrysophytes include both diatoms and golden algae.