Birds are adapted to aerial life due to
Presence of wings
Light weight of their body
Presence of air marrow
All the above
It's Obvious
Percentage of homology in the haemoglobin of man and gorilla is
There are how many total races of man
Formation of more complex and specialized organisms from the simple and less elaborated forms is called
Contribution of scientist : Abbe Lemaiter [$1931$]
