Cyanobacteria and heterotrophic bacteria have been clubbed together in eubacteria of kingdom-Monera as per the 'five kingdom classificatin' even though the two are vastly different from each other. Is this grouping of the two types of taxa in the same kingdom justified ? If so, why ? Discuss the cellular composition of cyanobacteria and heterotrophic bacteria that make them introduced in eubacteria.

Explanation

### Step-by-Step Solution:

1. **Introduction to the Question**:
The question asks whether the grouping of cyanobacteria and heterotrophic bacteria in the same kingdom (Monera) under eubacteria is justified, despite their differences.

2. **Understanding Cyanobacteria and Heterotrophic Bacteria**:
- **Cyanobacteria**: These are autotrophic bacteria that can perform photosynthesis, producing their own food using sunlight, carbon dioxide, and water.
- **Heterotrophic Bacteria**: These bacteria cannot synthesize their own food and instead obtain nutrition by consuming organic matter from other organisms.
...