The pyramid that cannot take the ''inverted'' shape is

Options

A. pyramid of numbers
B. pyramid of biomass
C. Pyramids of energy
D. pyramids of parasitic food chain

Answer

To determine which pyramid cannot take the inverted shape, we will analyze the different types of ecological pyramids: Pyramid of Numbers, Pyramid of Biomass, Pyramid of Energy, and Pyramid of Parasitic Food Chain.

### Step-by-Step Solution:

1. **Understanding the Types of Pyramids**:
- **Pyramid of Numbers**: Represents the number of individual organisms at each trophic level. This pyramid can be upright or inverted depending on the ecosystem.
- **Pyramid of Biomass**: Represents the total biomass at each trophic level. This can also be upright or inverted, depending on the specific organisms involved (e.g., zooplankton can have more biomass than phytoplankton).
- **Pyramid of Energy**: Represents the flow of energy through each trophic level. This pyramid is always upright because energy decreases as it moves up the trophic levels.
- **Pyramid of Parasitic Food Chain**: This can also be inverted, as parasites can be more numerous than their hosts.

2. **Analyzing Each Pyramid**:
- **Pyramid of Numbers**: Can be inverted.
- **Pyramid of Biomass**: Can be inverted.
- **Pyramid of Energy**: Cannot be inverted; it is always upright due to the 10% energy loss at each trophic level.
- **Pyramid of Parasitic Food Chain**: Can be inverted.

3. **Conclusion**:
- The only pyramid that cannot take the inverted shape is the **Pyramid of Energy**. This is because energy is lost at each trophic level, making it impossible for the energy pyramid to be inverted.

### Final Answer:
The pyramid that cannot take the inverted shape is the **Pyramid of Energy** (Option C).

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