Assertion: Seeds are formed by some species of spike moss.
Reason: All conditions for seed habit are fulfilled by these species of spike moss.

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, but the Reason is not the correct explanation of the Assertion.
C. If Assertion is true, but Reason is false.
D. If both Assertion and Reason are false.

Answer

To solve the question, we need to evaluate both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Seeds are formed by some species of spike moss."
- Spike moss refers to the genus Selaginella, which belongs to the class Lycopsida and is classified as a pteridophyte.
- It is known that certain species of Selaginella can produce structures that resemble seeds, known as "seed-like" structures, which are a part of their reproductive strategy.

2. **Evaluating the Assertion**:
- The assertion is indeed correct because some species of spike moss do produce these seed-like structures.

3. **Understanding the Reason**:
- The reason states that "All conditions for seed habit are fulfilled by these species of spike moss."
- This implies that the species of spike moss have all the necessary conditions that allow for the formation of seeds.

4. **Evaluating the Reason**:
- This statement is also correct because the reproductive structures of spike moss do fulfill many conditions that are typical for seed formation, such as protection of the developing embryo and provision of nutrients.

5. **Analyzing the Relationship**:
- While both the assertion and the reason are correct, the reason does not directly explain why seeds are formed by spike moss. The reason discusses conditions for seed habit but does not clarify how these conditions lead to the formation of seeds specifically in spike moss.

6. **Conclusion**:
- Since both statements are true, but the reason does not serve as a correct explanation for the assertion, the correct answer is that both the assertion and reason are true, but the reason is not the correct explanation of the assertion.

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

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