$A$ : Mutations are non-directional.
$R$ : Darwin’s small variations are directional.
Assertion and Reason both are correct and also correct explanation.
Assertion and Reason both are correct but not explanation of assertion.
Assertion is correct, but Reason is incorrect.
Both Assertion and Reason are incorrect.
Hugo de Vries's experimental organism was
The idea of mutations was brought forth by
Enumerate three most characteristic criteria for designating a Mendelian population.
Attempt giving a clear definition of the term species.