Choose the correct answer :
When the number of organisms at successive levels are plotted they assume the shape of a pyramid This is called pyramid of :

Options

A. Biomass
B. Number
C. Energy
D. None of these

Answer

To solve the question, we need to identify what type of pyramid is formed when the number of organisms at successive trophic levels is plotted. Here’s the step-by-step solution:

1. **Understanding the Concept**: In ecology, when we analyze the relationships between different trophic levels in an ecosystem, we can represent these relationships graphically. The number of organisms at each trophic level can be plotted.

2. **Identifying the Shape**: When the number of organisms is plotted against the trophic levels, the data typically takes the shape of a pyramid. This is due to the decreasing number of organisms as you move up the trophic levels (from producers to top predators).

3. **Types of Pyramids**: There are different types of pyramids in ecology:
- **Pyramid of Numbers**: Represents the number of individual organisms at each trophic level.
- **Pyramid of Biomass**: Represents the total mass of living matter at each trophic level.
- **Pyramid of Energy**: Represents the total energy at each trophic level.

4. **Choosing the Correct Answer**: Since the question specifically mentions the number of organisms, the correct term for this type of pyramid is the "Pyramid of Numbers."

5. **Final Answer**: Therefore, the correct answer to the question is **Pyramid of Numbers**.