The upright pyramid of number is absent in

Options

A. Forest
B. Lake
C. Grassland
D. Pond

Answer

To answer the question "The upright pyramid of number is absent in," we need to analyze the different ecosystems and their respective pyramids of numbers. Here’s a step-by-step solution:

### Step 1: Understand 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. Typically, in a healthy ecosystem, the number of individuals decreases as you move up the trophic levels.

### Step 2: Identify Different Ecosystems
Common ecosystems include:
- Grassland
- Forest
- Pond (or Lake)
- Desert

### Step 3: Analyze the Pyramid of Numbers in Each Ecosystem
1. **Grassland Ecosystem**:
- Primary producers (grasses) are abundant.
- Primary consumers (herbivores) are fewer.
- Secondary consumers (carnivores) are even fewer.
- This results in an upright pyramid of numbers.

2. **Pond/Lake Ecosystem**:
- Similar to grasslands, primary producers (aquatic plants) are numerous.
- Primary consumers (small fish, zooplankton) are fewer.
- Secondary consumers (larger fish) are even fewer.
- This also results in an upright pyramid of numbers.

3. **Forest Ecosystem**:
- Primary producers (trees) are fewer in number compared to primary consumers (insects, birds).
- Primary consumers can be more numerous than the trees.
- Secondary consumers (snakes, foxes) are fewer.
- This results in an inverted pyramid of numbers because the primary producers are less than the primary consumers.

### Step 4: Conclusion
Based on the analysis, the upright pyramid of numbers is absent in the **forest ecosystem**.

### Final Answer
The upright pyramid of number is absent in the **forest ecosystem**.

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