Question

Adaptations to aerial mode of life

Answer 1

1.The forelimbs of all the birds are modified in to wings which is useful for them to fly. 2.The bones of birds are hollow which decrises the weight hence it's help to fly. 3.there shap is like streamlined and spindle. this reduces the resistance while flying. 4.The exoskeleton is of feathers which make them lighter. 5.There are air sacsin their body which give buoyancy.

Answer 2

1: forelimbs of bird are modified in to life .  
2: shape is streamlined . 
3: exoskeleton is lighter .
4: they have wings for flight .
5: bones are hollow which decrease there weight .

i hope it helps..............................^_^