Pyramid of number is inverted in case of

Options

A. Pond ecosystem
B. Desert ecosystem
C. Grass land ecosystem
D. Forest ecosystem

Answer

**Step-by-Step Solution:**

1. **Understanding the Pyramid of Numbers**: The Pyramid of Numbers is a graphical representation that shows the number of individual organisms at each trophic level in an ecosystem. It can be upright or inverted.

2. **Characteristics of Upright and Inverted Pyramids**:
- **Upright Pyramid**: In an upright pyramid, the number of organisms decreases as you move from the base (producers) to the top (tertiary consumers). This is typical for most ecosystems.
- **Inverted Pyramid**: In an inverted pyramid, the number of organisms increases as you move up the trophic levels. This is less common and occurs in specific ecosystems.

3. **Examples of Ecosystems**:
- **Pond Ecosystem**: Typically has a large number of producers (like phytoplankton) and fewer consumers. This would result in an upright pyramid.
- **Desert Ecosystem**: Has very few producers (plants) due to harsh conditions, but may have a higher number of consumers (like herbivores and predators). This leads to an inverted pyramid.
- **Grassland Ecosystem**: Generally has a balanced number of producers and consumers, leading to an upright pyramid.
- **Forest Ecosystem**: Usually has a large number of producers (trees) and fewer consumers, resulting in an upright pyramid.

4. **Conclusion**: The pyramid of numbers is inverted in the case of the desert ecosystem, where the number of consumers is greater than the number of producers.

**Final Answer**: The pyramid of number is inverted in the case of the desert ecosystem.

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