The study of which of the following can be used for the conservation of endangered and extinct organisms?

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

Why are jams and pickles immersed in concentrated sugar solution or oil?

Which of the following methods is $NOT$ a classification system developed by integrating other disciplines?

Classification helps in:

Choose the correct sentences regarding biological nomenclature:
$(1)$ Biological names are generally in Latin and written in italics.
$(2)$ The first word in a biological name represents the genus while the second component denotes the specific epithet.
$(3)$ The genus name starts with a capital letter,while the specific epithet starts with a small letter.
$(4)$ The name of the author appears after the specific epithet in an abbreviated form.