Allopatric speciation is due to
Mutation
Geographical separation of populations
Migration of member of a species form one to other populations
Hybridization between closely related species
In order to check purity of honey and its source, pollen grains are being studied in a sample of honey. Such a study is called as
The branch which is associated with diagnosis, prevention and cure of mental disorders is
"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
Assertion : Jave Ape-man, Peking man and Heidelberg man are the fossils of Homo erectus.
Reason : Homo erectus evolved from Homo habilis.
Thick skull, cranial capacity about $1075$ c.c., low fore head, absence of chin and large canine were present in