Birds are adapted to aerial life due to
Presence of wings
Light weight of their body
Presence of air marrow
All the above
Organisms which obtain energy by the oxidation of reduced inorganic compounds are called
"In different races, there may be difference in culture and ways of living but capacity in all is the same''. It was the opinion of
Which one of the following is a pair of homologus organs
Which one of the following scientists is not related with organic evolution