According to Hugo de Vries,the mechanism of evolution is

$I.$ Use and disuse of organs
$II.$ Inheritance of acquired characters
$III.$ Branching descent
$IV.$ Natural selection
$V.$ Mutation
$VI.$ Reproductive isolation
The two key concepts of Darwinism from the given options are

Assertion : Natural selection is the outcome of difference in survival and reproduction among individuals that show variation in one or more traits.
Reason : Adaptive forms of a given trait tend to become more common; less adaptive ones become less common or disappear.

In the experiment to isolate streptomycin-resistant mutants using the replica plating technique,which proves that such mutations do not arise as an adaptation,what is required to be used for the replica plating?

Similarities observed in organisms with different genotypes are due to .......... .

Comment on the statement that 'evolution and natural selection are end result or consequence of some other processes but themselves are not processes'.