what is the peculiarity of chemoautotophs?

Options

A. Synthesis their own organic food
B. Pick up energy form chemical reactions
C. Convert light energy into chemical energy
D. Both A and B

Answer

### Step-by-Step Solution:

1. **Understanding Chemoautotrophs**: Chemoautotrophs are a type of organism that can synthesize their own food. The term "chemoautotroph" is derived from two parts: "chemo," which refers to chemical processes, and "autotroph," which means self-feeding or self-nourishing.

2. **Energy Source**: Unlike photoautotrophs, which obtain energy from sunlight, chemoautotrophs derive their energy from chemical reactions. They utilize inorganic substances (like hydrogen sulfide, ammonia, or ferrous iron) to obtain the energy necessary for the synthesis of their organic food.

3. **Food Synthesis**: Chemoautotrophs are capable of converting the energy obtained from chemical reactions into the chemical energy needed to produce organic compounds. This process is essential for their survival and growth.

4. **Peculiarity of Chemoautotrophs**: The unique feature or peculiarity of chemoautotrophs is that they can synthesize their own organic food using energy derived from chemical reactions rather than from sunlight. This distinguishes them from other autotrophs, particularly photoautotrophs.

5. **Conclusion**: Therefore, the peculiarity of chemoautotrophs lies in their ability to synthesize their own food using energy from chemical reactions, making them unique compared to other types of autotrophs.

### Answer Options:
- A) Synthesize their own organic food - **True**
- B) Pick up energy from chemical reactions - **True**
- C) Convert light energy into chemical energy - **False** (this is characteristic of photoautotrophs)
- D) Both A and B - **Correct Answer**

### Final Answer: The peculiarity of chemoautotrophs is that they synthesize their own organic food using energy derived from chemical reactions (Option D).

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