'Genetic species concept' was given by
Lamarck
Lotsy
Ernst Mayr
Linnaeus
(b)According to Lotsy $(1918)$ a species is a group of genetically identical individuals.
A species that contains two or more sub-species are called
There are two opposing views about origin of modern man. According to one view Homo erectus in Asia were the ancestors of modern man. A study of variation of $DNA $ however suggested African origin of modern man. What kind of observation on $DNA$ variation could suggest this
Bio – chemical evolution was proposed by.
$A$ : Blood group analysis shows the human beings are more closely related to apes than to monkeys. $R$ : The blood groups $A$ and $B$ are found in apes but not in monkeys.
The term 'Fisheries' refers to