Bacteria and fungi developing on dead decaying organisms are

Options

A. Parasites
B. Commensals
C. Saprophytes
D. Symbionts

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the type of organisms that develop on dead and decaying organisms, specifically bacteria and fungi.

2. **Analyzing the Options**:
- **Parasites**: These organisms live on or in a host organism, deriving nutrients at the host's expense. They do not typically inhabit dead organisms. Examples include protozoa and helminths. Thus, this option is incorrect.
- **Commensals**: This type of organism benefits from another without harming it. However, commensals do not specifically depend on dead and decaying matter for their existence. Therefore, this option is also incorrect.
- **Saprophytes**: These are organisms that feed on dead and decaying organic matter. They play a crucial role in breaking down complex organic materials into simpler substances through the secretion of digestive enzymes. This option is correct.
- **Symbiotes**: These organisms live in close association with another organism, often benefiting both. However, they do not specifically rely on dead and decaying organisms. Hence, this option is incorrect.

3. **Conclusion**: Based on the analysis, the correct answer is **saprophytes**, as they are the organisms that develop on dead and decaying organisms.

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