Cyanobacteria are classified under

Options

A. Protista
B. Plantae
C. Monera
D. Algae

Answer

To solve the question "Cyanobacteria are classified under," we can follow these steps:

### Step-by-Step Solution:

1. **Understand what Cyanobacteria are**:
- Cyanobacteria are often referred to as blue-green algae. They are photosynthetic organisms that can produce their own food using sunlight.

2. **Identify the characteristics of Cyanobacteria**:
- Cyanobacteria are prokaryotic organisms, meaning they do not have a true nucleus or membrane-bound organelles. This is a key characteristic that helps in classification.

3. **Review the classification options**:
- The options given are:
1. Protista
2. Planti
3. Monera
4. Algae

4. **Analyze each option**:
- **Option 1: Protista** - This kingdom includes eukaryotic organisms, which have a defined nucleus. Since cyanobacteria are prokaryotic, this option is incorrect.
- **Option 2: Planti** - This kingdom includes all plants, which are also eukaryotic and have cell walls made of cellulose. Cyanobacteria do not fit this classification, so this option is incorrect.
- **Option 3: Monera** - This kingdom includes prokaryotic organisms. Since cyanobacteria are prokaryotic, this option is correct.
- **Option 4: Algae** - While cyanobacteria are sometimes referred to as algae, true algae are eukaryotic. Thus, this option is also incorrect.

5. **Conclude the correct classification**:
- Based on the analysis, the correct classification for cyanobacteria is under **Monera**.

### Final Answer:
Cyanobacteria are classified under **Monera**.

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