Which of the following is an example of analogous organ?

Options

A. Flippers of penguins and dolphin
B. Fins of shark and whale
C. Eye of octopus and of mammal
D. All of these

Answer

To determine which of the following is an example of an analogous organ, we need to understand the concept of analogous organs.

### Step-by-Step Solution:

1. **Definition of Analogous Organs**:
- Analogous organs are structures that perform similar functions but have different evolutionary origins. They arise from different ancestral lines but have adapted to perform similar roles in different organisms.

2. **Analyzing the Options**:
- **Option A: Flippers of Penguins and Dolphins**:
- Penguins (birds) and dolphins (mammals) have flippers that serve the same function of swimming, but they have different structural origins. Thus, they are analogous organs.

- **Option B: Fins of Shark and Whale**:
- Sharks (fish) and whales (mammals) both have fins that allow them to swim. The fins are structurally different but serve the same function, making them analogous organs.

- **Option C: Eyes of Octopus and Mammals**:
- The eyes of octopuses (cephalopods) and mammals serve the purpose of vision. They are also structurally different and evolved independently, thus they are considered analogous organs.

- **Option D: All of These**:
- Since all the previous options describe analogous organs, this option is correct.

3. **Conclusion**:
- All the provided examples (flippers of penguins and dolphins, fins of shark and whale, eyes of octopus and mammals) are analogous organs. Therefore, the correct answer is **D: All of These**.