the rate of decomposition increases if detritus is rich in

Options

A. Lignin and chitin
B. nitrogen compounds like protein and nucleic acid
C. tennis and cellulose
D. chitin and phenotics

Answer

To solve the question "the rate of decomposition increases if detritus is rich in", we need to analyze the options provided and understand the factors that influence the decomposition process.

### Step-by-Step Solution:

1. **Understanding Decomposition**:
- Decomposition is the process where complex organic matter (like dead plants and animals) is broken down into simpler substances by decomposers (microorganisms).
- This process is essential for nutrient cycling in ecosystems.

2. **Identifying Detritus**:
- Detritus refers to the dead organic matter that serves as a raw material for decomposition. It can include plant remains, animal remains, and fecal matter.

3. **Factors Affecting Decomposition**:
- The rate of decomposition is influenced by several factors, including the chemical composition of the detritus, temperature, moisture, and the presence of decomposers.
- The chemical composition is particularly important; certain compounds can enhance or inhibit the rate of decomposition.

4. **Analyzing the Options**:
- **Option A: Lignin and Chitin**: Both are known to be resistant to decomposition. Lignin is a complex organic polymer found in plant cell walls, and chitin is a component of fungal cell walls and exoskeletons of arthropods. Thus, this option is incorrect.
- **Option B: Nitrogen compounds like protein and nucleic acid**: Nitrogen-rich compounds are easily broken down by decomposers, leading to a higher rate of decomposition. This option is likely correct.
- **Option C: Tannin and Cellulose**: Tannins can inhibit decomposition, and while cellulose decomposes, it does so at a slower rate compared to nitrogen-rich compounds. This option is less favorable.
- **Option D: Chitin and Phenolics**: Similar to option A, chitin is resistant to decomposition, and phenolics can also slow down the process. This option is incorrect.

5. **Conclusion**:
- The correct answer is **Option B: Nitrogen compounds like protein and nucleic acid**. Detritus that is rich in nitrogen compounds will lead to an increased rate of decomposition.