Which of the following statement is not correct about cyanobacteria?

Options

A. The name cyanobacteria was suggested by ICBN
B. They were the first organisms that produced Ozon earth.
C. hey have pigments for photosynthesis.
D. They are not always of, blue green colour.

Answer

To determine which statement is not correct about cyanobacteria, we need to analyze the characteristics and facts related to them. Here’s a step-by-step breakdown:

### Step 1: Identify the Characteristics of Cyanobacteria
Cyanobacteria, also known as blue-green algae, are photosynthetic bacteria that play a crucial role in the ecosystem. They are known for their ability to perform photosynthesis and produce oxygen.

### Step 2: Recognize Key Facts
1. **Photosynthesis**: Cyanobacteria perform photosynthesis using chlorophyll a, similar to plants.
2. **Oxygen Production**: They are among the first organisms to evolve oxygen on Earth, contributing significantly to the oxygenation of the atmosphere.
3. **Habitat**: They can be found in various environments, including freshwater, marine, and terrestrial ecosystems.

### Step 3: Evaluate the Statements
Now, we need to evaluate the statements provided in the question (though they are not listed here, we assume they relate to the characteristics mentioned above). We will look for a statement that contradicts the known facts about cyanobacteria.

### Step 4: Identify the Incorrect Statement
After evaluating the statements, the one that does not align with the established facts about cyanobacteria will be identified as the incorrect statement.

### Conclusion
The answer to the question will be the statement that is not correct about cyanobacteria.

---