Assertion: Frog has a fish-like tadpole larva in its life history
Reason: Ontogeny repeats phylogeny.

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 Solution:**

1. **Understanding the Assertion**: The assertion states that "Frog has a fish-like tadpole larva in its life history." This means that during its early developmental stage, a frog exhibits characteristics similar to those of fish.

2. **Understanding the Reason**: The reason provided is "Ontogeny repeats phylogeny." Ontogeny refers to the development of an individual organism from the embryo to its mature form, while phylogeny refers to the evolutionary history of a species. The statement suggests that the development of an organism reflects the evolutionary stages of its ancestors.

3. **Explaining the Connection**: The assertion can be explained by the reason. Frogs, as amphibians, evolved from fish-like ancestors. During the tadpole stage, frogs exhibit features that are reminiscent of their fish ancestors, such as a tail and gills. This aligns with the concept of recapitulation theory proposed by Ernst Haeckel, which states that the development of an organism (ontogeny) mirrors the evolutionary history (phylogeny) of that organism.

4. **Conclusion**: Both the assertion and the reason are true. The reason correctly explains the assertion. Therefore, the answer to the question is that both statements are true, and the reason is the correct explanation for the assertion.

**Final Answer**: Both the assertion and reason are true, and the reason is the correct explanation of the assertion.

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