Question

Which of the following sets do not have homologous organs?

• A. Mouth parts of cockroach and butterfly
• B. Wings of butterfly and bird
• C. Wings of mosquito and butterfly
• D. Forelegs of horse and paddles of whale

Answer 1

The correct option is B Wings of butterfly and bird

• Wings of butterflies and birds are not homologous organs, they are analogous organs.
• It is because they are similar in function i.e., flying but different in their origin and structure.
• In contrast, homologous organs are similar in their origin and structure but have different functions.

So, the correct answer is option B.