Which one of the following statements is wrong?

Options

A. (a) Golden algae are also called desmids
B. (b) Eubacteria are also called false bacteria
C. (c) Phycomycetes are also called algal fungi
D. (d) Cyanobacteria are also called blue-green algae

Answer

To determine which statement is wrong among the given options, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Analyze Statement A**: "Golden algae are also called desmids."
- **Explanation**: This statement is true. Golden algae belong to the group known as chrysophytes, which are indeed referred to as desmids. They are primarily found in freshwater environments.

2. **Analyze Statement B**: "Eubacteria are also called false bacteria."
- **Explanation**: This statement is false. Eubacteria are known as true bacteria. They are unicellular and prokaryotic, meaning they lack a well-defined nucleus and membrane-bound organelles. Therefore, calling them "false bacteria" is incorrect.

3. **Analyze Statement C**: "Phycomycetes are also called algal fungi."
- **Explanation**: This statement is true. Phycomycetes, which are a class of fungi, are referred to as algal fungi due to their resemblance to algae in terms of their reproductive structures and thallus organization.

4. **Analyze Statement D**: "Cyanobacteria are also called blue-green algae."
- **Explanation**: This statement is true. Cyanobacteria contain pigments such as cyanophysin that give them a blue-green color, which is why they are commonly referred to as blue-green algae. They also exhibit morphological similarities to algae.

5. **Conclusion**: After analyzing all the statements, we find that Statement B is the only incorrect statement. Eubacteria are not called false bacteria; they are known as true bacteria.

### Final Answer:
The wrong statement is: **B. Eubacteria are also called false bacteria.**

---