Taxonomy is based on:

Study the four statements $(A-D)$ given below and select the two correct ones out of them.
$A.$ Definition of biological species was given by Ernst Mayr.
$B.$ Photoperiod does not affect reproduction in plants.
$C.$ Binomial nomenclature system was given by $R$.$H$. Whittaker.
$D.$ In unicellular organisms,reproduction is synonymous with growth.
The two correct statements are:

Why is the study of taxonomy performed?

Which of the following statements is $NOT$ appropriate for the study of taxonomy?

Which one of the following criteria is/are essential and form the basis of modern taxonomic studies?

Classification and identification of living organisms are not necessary for which of the following?