Which of the bacteria are autotropus

Options

A. Pathogenic
B. Saprophytic
C. Denitrifying
D. Chemosynthetic

Answer

**Step-by-Step Solution:**

1. **Understanding Autotrophs:**
- Autotrophs are organisms that can produce their own food. They do this through processes such as photosynthesis or chemosynthesis.

2. **Identifying Types of Bacteria:**
- There are various types of bacteria based on their nutritional modes:
- **Pathogenic Bacteria:** These bacteria cause diseases and do not produce their own food.
- **Saprophytic Bacteria:** These bacteria feed on decayed organic matter and also do not produce their own food.
- **Denitrifying Bacteria:** These bacteria convert nitrates in the soil into atmospheric nitrogen. They play a role in the nitrogen cycle but are not autotrophs.
- **Chemosynthetic Bacteria:** These bacteria obtain their energy from the oxidation of inorganic molecules and convert them into organic substances. They can produce their own food, making them autotrophs.

3. **Conclusion:**
- The bacteria that are classified as autotrophs are primarily chemosynthetic bacteria. They utilize inorganic molecules as a source of energy to create their own food.

**Final Answer:**
- The bacteria that are autotrophs are chemosynthetic bacteria.

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