The organisms which are not represented in ecological pyramids are

Options

A. Producers
B. Saprophytes
C. Herbivores
D. Carnivores

Answer

### Step-by-Step Solution:

1. **Understanding Ecological Pyramids**:
- Ecological pyramids are graphical representations that show the relationships between different trophic levels in an ecosystem. They can represent biomass, energy, or the number of organisms at each level.

2. **Identifying Trophic Levels**:
- Trophic levels are the different levels in a food chain or food web. The primary levels include:
- **Producers**: These are typically plants and grasses that produce energy through photosynthesis.
- **Herbivores**: These organisms feed on producers.
- **Carnivores**: These organisms feed on herbivores.

3. **Analyzing the Options**:
- The question provides four options: producers, saprophites, herbivores, and carnivores.
- Producers, herbivores, and carnivores are all represented in ecological pyramids as they occupy specific trophic levels.

4. **Identifying the Exception**:
- **Saprophites** (or decomposers) are organisms that break down dead organic matter. They play a crucial role in nutrient cycling but are not represented in ecological pyramids.
- This is because ecological pyramids focus on the flow of energy and biomass through living organisms, while saprophites primarily deal with decomposition.

5. **Conclusion**:
- Therefore, the organisms that are not represented in ecological pyramids are **saprophites**.

### Final Answer:
The organisms which are not represented in ecological pyramids are **saprophites**.