Mutation introduces new genes into a species and brings about the changes in
Phenotypes
Genotypes
Both $(a)$ and $(b)$
None of these
$A$ : India falls under oriental realm out of other biogeographical realms.
$R$ : World is divided in six biogeographical realms.
The age of rock is calulated on the basis of
Gill clefts and notochord appear in the embryonic development of all vertebrates from fishes to mammals. This supports the theory of
Coacervates were experimentally produced by