Which of the following sets do not have homologous organs:

Options

A. Wings of mosquito and butterfly
B. mouth parts of butterfly and mosquito
C. Mouth parts and cockroach nd butterfly
D. all of the above

Answer

To determine which of the following sets do not have homologous organs, we first need to understand what homologous organs are. Homologous organs are those that have a common evolutionary origin but may serve different functions in different organisms.

### Step-by-Step Solution:

1. **Define Homologous Organs**:
- Homologous organs are structures that share a common ancestry but have evolved to perform different functions. For example, the forelimbs of mammals (like humans, whales, and bats) are homologous because they share a common structural origin despite serving different purposes (grasping, swimming, flying).

2. **Identify the Sets**:
- The question provides several sets of organs. We need to analyze each set to determine if they are homologous or not.

3. **Analyze Each Set**:
- **Wings of Mosquito and Butterfly**: These wings have different origins (insect vs. insect) and serve similar functions (flight). Therefore, they are not homologous.
- **Forelimbs of Different Mammals**: These limbs have a common origin but serve different functions (e.g., grasping, swimming). They are homologous.
- **Wings of Cockroach and Butterfly**: These wings have different evolutionary origins (different classes of insects) but serve similar functions (flight). Thus, they are not homologous.

4. **Conclusion**:
- The sets that do not have homologous organs are the wings of mosquito and butterfly, and the wings of cockroach and butterfly. The only set that is homologous is the forelimbs of different mammals.

5. **Final Answer**:
- Therefore, the correct answer to the question is that the sets of wings of mosquito and butterfly, and wings of cockroach and butterfly do not have homologous organs.