Homologous organs are structures sharing an evolutionary origin.
Some dinosaurs had feathers although they could not fly and birds have feathers that help them to fly. In the context of evolution, this means that : (a) reptiles have evolved from birds (b) there is no evolutionary connection between reptiles and birds (c) feathers are homologous structures in both the organisms (d) birds have evolved from reptiles
What are homologous organs? How do these organs help in understanding evolutionary relationships?