Flippers of seal are modified `:`

Options

A. Hind limbs
B. Fore limbs
C. Fins
D. Gills

Answer

**Step-by-Step Solution:**

1. **Identify the Organ in Question**: The question asks about the flippers of seals. We need to recognize that flippers are a type of limb used for swimming.

2. **Classify the Organ**: Flippers are modified limbs. In the case of seals, these flippers are modified forelimbs. This means that while they serve a different function (swimming), they originate from the same basic structure as the forelimbs of other mammals.

3. **Understand the Concept of Homologous Organs**: The flippers of seals, like the forelimbs of humans, cheetahs, and whales, share a similar bone structure. This similarity in structure despite different functions is a key characteristic of homologous organs.

4. **Explain the Evolutionary Significance**: The similarity in bone structure indicates a common ancestry among these mammals. This means that seals, humans, cheetahs, and whales evolved from a common ancestor, but adapted their limbs for different purposes over time.

5. **Conclude with the Correct Answer**: Therefore, the flippers of seals are modified forelimbs, which is an example of homologous organs that illustrate the concept of common ancestry in evolution.

**Final Answer**: Flippers of seals are modified forelimbs.

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