Assertion: Gemmules are asexual bodies found in sponges.
Reason: They are formed for the persistence of race.

Options

A. If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
B. If both Assertion and Reason are true and the Reason is not
the 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 Text Solution:

1. **Understanding the Assertion**: The assertion states that "Gemmules are asexual bodies found in sponges."
- **Explanation**: Gemmules are indeed a type of asexual reproductive structure found in certain sponges. They are formed as a response to environmental stress and can survive harsh conditions.

2. **Understanding the Reason**: The reason provided is "They are formed for the persistence of race."
- **Explanation**: Gemmules serve as a means for sponges to survive unfavorable conditions and ensure the continuation of their species. They can remain dormant until conditions improve, allowing the sponge to persist through tough times.

3. **Evaluating the Truth of Both Statements**:
- Both the assertion and the reason are true.
- The assertion correctly identifies gemmules as asexual bodies in sponges.
- The reason accurately describes the purpose of gemmules in aiding the survival and persistence of the sponge species.

4. **Determining the Relationship Between Assertion and Reason**:
- The reason provided is a correct explanation of the assertion. Gemmules are indeed formed for the purpose of ensuring the survival of the sponge species, which aligns with the assertion that they are asexual bodies.

5. **Conclusion**: Since both the assertion and reason are true, and the reason correctly explains the assertion, the correct answer is:
- **Answer**: A (Both assertion and reason are true, and reason is the correct explanation of the assertion).