Assertion: Slime moulds are protistan decomposers.
Reason: Slime moulds are eukaryotes.

Options

A. If both assertion and Reason are true and the reason is a correct explanation of the assertion.
B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion and Reason are False.

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion**: The assertion states that "Slime moulds are protistan decomposers." This means that slime moulds belong to the group of organisms known as protists and that they play a role in breaking down dead organic matter.

2. **Evaluating the Assertion**: Slime moulds are indeed classified as protists. They are known for their ability to decompose organic material, which makes them important for nutrient cycling in ecosystems. Therefore, the assertion is true.

3. **Understanding the Reason**: The reason states that "Slime moulds are eukaryotes." Eukaryotes are organisms whose cells have a nucleus and membrane-bound organelles.

4. **Evaluating the Reason**: Slime moulds are classified as eukaryotes because they possess a defined nucleus and other organelles. Hence, the reason is also true.

5. **Analyzing the Relationship**: While both the assertion and the reason are true, the reason does not directly explain why slime moulds are considered decomposers. The fact that slime moulds are eukaryotic does not inherently make them decomposers; rather, it is their ecological role in feeding on dead and decaying matter that defines them as decomposers.

6. **Conclusion**: Therefore, the correct answer is that both the assertion and the reason are true, but the reason is not a correct explanation of the assertion.

**Final Answer**: Both the assertion and the reason are true, but the reason is not a correct explanation of the assertion.

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