Give the evidence that the birds have evolved from reptiles

(a) Give the evidence that the birds have evolved from reptiles.
(b) Insects, octopus, planaria and vertebrates possess eyes. Can we group these animals together on the basis of eye that they possess ? Justify your answer giving reason.

(a) The function of feathers initially was to provide insulation but later on they became useful for flight in birds only. Similarly, some dinosaurs had feathers, although they could not fly using the feathers. Birds seem to have later adapted the feathers to flight. This, of course, means that birds are very closely related to reptiles, since dinosaurs were reptiles.
(b) The structure of the eye in each of these organisms is different. This indicates that, these organisms have separate evolutionary origins.