An inverted pyramid of number and an inverted Pyramid of biomass are respectively seen in

Options

A. Grassland and tree ecosystem
B. Sea and Tree ecosystem
C. Tree and Sea ecosystem
D. Sea and Grassland ecosystem

Answer

To solve the question regarding the inverted pyramid of numbers and biomass, we need to analyze the ecosystems mentioned and understand the characteristics of each.

### Step-by-Step Solution:

1. **Understand the Concept of Inverted Pyramid of Numbers**:
- An inverted pyramid of numbers occurs when the number of individuals decreases at each successive trophic level. This is typically seen in ecosystems where a few large producers support a larger number of consumers.
- Example: In a tree ecosystem, one tree (producer) can support many insects and birds (consumers), leading to an inverted pyramid.

2. **Understand the Concept of Inverted Pyramid of Biomass**:
- An inverted pyramid of biomass occurs when the total biomass decreases at each successive trophic level. This is often observed in aquatic ecosystems.
- Example: In a sea ecosystem, phytoplankton (producers) have a low biomass compared to the larger number of zooplankton and fish (consumers) that feed on them, resulting in an inverted pyramid.

3. **Analyze the Given Options**:
- **Grassland and Tree Ecosystem**: Typically, grasslands have a normal pyramid of numbers and biomass.
- **Sea and Tree Ecosystem**: This option suggests a combination of an inverted pyramid of numbers (tree ecosystem) and an inverted pyramid of biomass (sea ecosystem).
- **Tree and Sea Ecosystem**: This option suggests the tree ecosystem has an inverted pyramid of numbers, and the sea ecosystem has an inverted pyramid of biomass.
- **Sea and Grassland Ecosystem**: Grasslands usually do not exhibit inverted pyramids.

4. **Select the Correct Option**:
- Based on the analysis, the tree ecosystem exhibits an inverted pyramid of numbers, while the sea ecosystem exhibits an inverted pyramid of biomass.
- Therefore, the correct answer is **C: Tree and Sea Ecosystem**.

### Final Answer:
The correct answer is **C: Tree and Sea Ecosystem**.