Question

(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 eyes that they possess? Justify your answer giving reason.

Answer 1

(a)fossils provide an explanation for evolution.some dinosaurs had feathers tht provided dem insulation in cold weather,bt they cud not use dem for flyin purpose.birds seem 2 hv later used feathers 2 fly.dis means tht birds r very closely relatd 2 reptiles which suggests tht birds hv evolved frm reptiles.
(b)some animals hv commn features cuz all organisms hv into being b evolution frm a commn ancestor. similarities and disimmilarities r determind on d presence or absence of a characteristic in an organism,.
Based on dis they r classified into grps.....................

Answer 2

(a) Birds have evolved from reptiles. This is evident by a fossil bird named Archaeopteryx which has looks like a bird but the features have similarities with the reptiles such as it has feathers wings like birds but the teeth of Archaeopteryx look like those of reptiles. Thus Archaeopteryx connects reptiles and birds and it seems that birds have been evolved from the reptiles.  

(b) No, we can't group Insects, octopus, planaria and vertebrates on the basis of eyes because the eye structure is different in different organisms and thus suggests their separate origin of evolution.