Pyramid of number in a cropland ecosystem is

Options

A. Upright
B. Inverted
C. Rhomboidal
D. Spindle shap

Answer

### Step-by-Step Solution:

1. **Understanding the Cropland Ecosystem**:
- A cropland ecosystem is a type of terrestrial ecosystem where crops are cultivated. It consists of various organisms that interact with each other in a food chain.

2. **Identifying the Food Chain**:
- In a typical cropland ecosystem, the food chain can be represented as follows:
- Grass (Producer) → Grasshopper (Primary Consumer) → Frog (Secondary Consumer) → Snake (Tertiary Consumer) → Eagle (Quaternary Consumer).

3. **Defining the Pyramid of Numbers**:
- The pyramid of numbers represents the number of individual organisms at each trophic level in an ecosystem. It visually depicts how many organisms are present at each level of the food chain.

4. **Analyzing Each Trophic Level**:
- At the base of the pyramid, we have the producers (grass), which are the most numerous.
- The primary consumers (grasshoppers) are fewer in number than the producers.
- The secondary consumers (frogs) are fewer than the primary consumers.
- The tertiary consumers (snakes) are fewer than the secondary consumers.
- Finally, the quaternary consumers (eagles) are the least numerous.

5. **Constructing the Pyramid**:
- When we construct the pyramid based on the number of organisms:
- The base (largest section) will be occupied by grass (producers).
- The next level will have grasshoppers.
- Above that will be frogs.
- Then snakes.
- At the top will be eagles (the least numerous).

6. **Conclusion**:
- The shape of the pyramid of numbers in a cropland ecosystem is upright, as it shows a decrease in the number of organisms from the base to the top.

### Final Answer:
The pyramid of number in a cropland ecosystem is upright.

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