The wings of an insect and a bat exhibit

Options

A. Vestigial organs
B. Exoskeletal structures
C. Homologous organs
D. Analogous organs.

Answer

To answer the question regarding the wings of an insect and a bat, we need to analyze the characteristics of these wings and the concepts of vestigial organs, homologous organs, and analogous organs.

### Step-by-Step Solution:

1. **Understanding Vestigial Organs**:
- Vestigial organs are those that have lost their original function through evolution. Examples in humans include the appendix and wisdom teeth.
- Since both the insect and bat wings serve the function of flight, they do not qualify as vestigial organs.
- **Conclusion**: This option is incorrect.

2. **Understanding Exoskeletal Structures**:
- Exoskeletons are external skeletons that provide support and protection, typically found in arthropods like insects.
- Bat wings, however, are made of skin stretched over bones, not an exoskeleton.
- **Conclusion**: This option is also incorrect.

3. **Understanding Homologous Organs**:
- Homologous organs arise from a common ancestor but may serve different functions. An example is the forelimbs of mammals, which have different functions but share a similar structure.
- The wings of insects and bats do not share a common ancestor; they evolved independently for the same function (flight).
- **Conclusion**: This option is incorrect.

4. **Understanding Analogous Organs**:
- Analogous organs perform similar functions but do not share a common evolutionary origin. The wings of insects and bats are a prime example, as they both enable flight but evolved separately.
- **Conclusion**: This is the correct option.

### Final Answer:
The wings of an insect and a bat exhibit **analogous organs**.

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