These organisms use inorganic molecules for their energy and `CO_(2)` as the source of carbon

Options

A. Chemo-heterotrophs
B. Photo-heterotrophs
C. Photo-autotrophs
D. Chemo-autotrophs

Answer

To answer the question regarding organisms that use inorganic molecules for energy and carbon dioxide (CO₂) as the source of carbon, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Types of Organisms**:
- Organisms can be categorized based on their energy and carbon sources. The main categories are:
- **Autotrophs**: Organisms that produce their own food.
- **Heterotrophs**: Organisms that rely on other organisms for food.

2. **Identifying the Specific Types**:
- Among autotrophs, there are two main types:
- **Photoautotrophs**: Use light energy to convert CO₂ into organic compounds (e.g., plants).
- **Chemoautotrophs**: Use inorganic molecules (like hydrogen sulfide or ammonia) as their energy source and CO₂ as their carbon source.

3. **Analyzing the Options**:
- The question provides options that include:
- Chemoheterotrophs
- Photoheterotrophs
- Chemoautotrophs
- **Chemoheterotrophs**: These organisms obtain energy by consuming organic compounds and cannot use CO₂ as their carbon source.
- **Photoheterotrophs**: These organisms use light for energy but still rely on organic compounds for carbon.
- **Chemoautotrophs**: These organisms use inorganic molecules for energy and CO₂ for carbon.

4. **Selecting the Correct Answer**:
- Based on the definitions and the analysis, the correct answer is **Chemoautotrophs**. They are the organisms that use inorganic molecules for energy and CO₂ as the source of carbon.

### Final Answer:
**Chemoautotrophs** are the organisms that use inorganic molecules for energy and CO₂ as the source of carbon.

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