Chemosynthetic bacteria do not need sunlight to grow because

Options

A. They prepare their food without the help of light
B. They do not like sunlight brightness
C. Due to absence of chlorophyll they are incapable of manufacturing their own food
D. They use other kinds of light for manufacturing their own food.

Answer

**Step-by-Step Solution:**

1. **Understanding Chemosynthetic Bacteria:**
- Chemosynthetic bacteria are a type of bacteria that do not require sunlight to grow. They belong to the Kingdom Monera, which consists of unicellular prokaryotes.

2. **Autotrophic Nature:**
- These bacteria are autotrophic, meaning they can produce their own food. However, unlike photosynthetic organisms that use light energy, chemosynthetic bacteria obtain energy from inorganic chemicals.

3. **Energy Source:**
- Chemosynthetic bacteria use chemical reactions involving inorganic substances to convert them into organic compounds, which they then use as food. This process does not involve sunlight.

4. **Absence of Chlorophyll:**
- While it is true that chemosynthetic bacteria do not have chlorophyll, this does not mean they cannot manufacture their own food. Instead, they utilize chemical energy rather than light energy.

5. **Conclusion:**
- Therefore, the correct statement is that chemosynthetic bacteria prepare their food without the help of light. This distinguishes them from photosynthetic organisms, which require light for their energy needs.

**Final Answer:**
Chemosynthetic bacteria do not need sunlight to grow because they prepare their food without the help of light.

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