In which of the following are the works of Bentham and Hooker $NOT$ useful?

$DNA$ sequence is the basis of grouping organisms in

Assertion : Species are groups of potentially interbreeding natural populations which are isolated from other such groups.
Reason : Distinctive morphological characters are displayed due to reproductive isolation.

In the scientific name of an organism,what does the first name represent?

Two animals which are the members of the same order must also be the members of the same . . . . . .

Which of the following taxonomic categories is being described by the given statements $(i-iii)$?
$(i)$ It is the basic unit of classification.
$(ii)$ It is defined as the group of individuals which resemble in their morphological and reproductive characters and interbreed among themselves and produce fertile offspring.
$(iii)$ Human beings belong to the species $sapiens$ which is grouped in the genus $Homo$.