Who is known as the father of taxonomy?

Which of the following taxonomic categories contains organisms with the least number of similarities?

Which of the following is a class?

Four statements are given below regarding species. Which two statements are correct?
$(1)$ Maximum similarity in maximum number of characters.
$(2)$ First letter in capital letter.
$(3)$ Latin word written after the scientific name.
$(4)$ Repetition of the species name is not possible.

What is a species?

As we move from Kingdom to Species in the taxonomic hierarchy,the number of common characteristics among organisms .............