Identify the incorrect statement from the following.

Options

A. Reservoir pool for phosphorus cycle is earth's crust whereas atmosphere is the reservoir pool for carbon cycle.
B. During carbon cycle and phosphorus cycle, there is very little respiratory release of carbon and phosphorus.
C. Atmospheric inputs of phosphorus through rainfall are much smaller than carbon inputs.
D. Gaseous exchanges of phosphorus between organism and enviornment are negligible.

Answer

To solve the question of identifying the incorrect statement, we will analyze each option provided in the context of the phosphorus and carbon cycles.

### Step-by-Step Solution:

1. **Understand the Phosphorus Cycle**:
- The phosphorus cycle primarily involves the movement of phosphorus through the lithosphere (earth's crust), hydrosphere (water bodies), and biosphere (living organisms).
- Phosphorus does not have a significant gaseous phase; it mainly exists in solid forms and is released through weathering of rocks.

2. **Understand the Carbon Cycle**:
- The carbon cycle involves the movement of carbon through the atmosphere, biosphere, hydrosphere, and lithosphere.
- Carbon exists in various forms, including carbon dioxide (CO2), which is released into the atmosphere through respiration and combustion.

3. **Analyze Each Statement**:
- **Option 1**: "The reservoir pool for the phosphorus cycle is the earth's crust, whereas the atmosphere is the reservoir for the carbon cycle."
- This statement is **correct**. Phosphorus is primarily found in rocks, and carbon is found in the atmosphere as CO2.

- **Option 2**: "During the carbon cycle and phosphorus cycle, there is very little respiratory release of carbon and phosphorus."
- This statement is **incorrect**. While phosphorus does not have significant gaseous exchange, the carbon cycle involves substantial respiratory release of carbon dioxide by organisms.

- **Option 3**: "Atmospheric input of phosphorus through rainfall is much smaller than the carbon inputs."
- This statement is **correct**. Phosphorus inputs from the atmosphere are minimal compared to the large amounts of carbon that enter the atmosphere.

- **Option 4**: "Gaseous exchange of phosphorus between organisms and the environment is negligible."
- This statement is **correct**. Phosphorus does not have a gaseous form in the cycle, and its exchange is minimal.

4. **Conclusion**:
- The incorrect statement among the options is **Option 2**, as it misrepresents the respiratory release of carbon and phosphorus during their respective cycles.

### Final Answer:
The incorrect statement is **Option 2**: "During the carbon cycle and phosphorus cycle, there is very little respiratory release of carbon and phosphorus."

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