The importance of random accumulation of small genetic changes is sufficient to explain evolution. Who proposed this concept?

The idea of "survival of the fittest" was given by

Industrial melanism was highlighted by

Select the incorrect statements:
$I.$ Natural selection is essential for evolution.
$II.$ Natural selection does not include variations.
$III.$ The concept of natural selection was given by Hugo de Vries.
$IV.$ Mutation is a sudden inheritable change.
$V.$ The synthetic theory is also called the Neo-Darwinism theory of evolution.

Which of the following is essential for speciation?

Natural selection operates at