Blue green algae come under which group of organisms?

Options

A. Archebacteria
B. Algae
C. Eubacteria
D. Protista

Answer

**Step-by-Step Solution:**

1. **Understanding Blue-Green Algae**: Blue-green algae are commonly known as cyanobacteria. They are photosynthetic organisms that can be found in various aquatic environments.

2. **Classification of Blue-Green Algae**: Blue-green algae belong to the group known as 'U bacteria'. This classification is important as it distinguishes them from other types of bacteria and algae.

3. **Characteristics of U Bacteria**: U bacteria, which include cyanobacteria, have specific characteristics:
- They possess a rigid cell wall.
- They are classified as true bacteria (prokaryotes).
- They do not have flagella, which are common in other types of bacteria.

4. **Habitat of Blue-Green Algae**: Blue-green algae are primarily found in freshwater environments, although some marine forms exist, they are less common.

5. **Reproduction in Blue-Green Algae**: Blue-green algae reproduce asexually through methods such as fragmentation. They do not engage in sexual reproduction.

6. **Ecological Role**: An important ecological role of blue-green algae is their ability to fix atmospheric nitrogen, which is beneficial for the ecosystem.

7. **Final Answer**: Based on the classification and characteristics discussed, blue-green algae come under the group of organisms known as U bacteria.

**Answer**: Blue-green algae come under the group of organisms known as U bacteria.

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