Which taxonomic category is formed by a group of closely related species?

Which of the following is absent in the sub-category 'Order'?

What is the first step of taxonomy?

What do the taxonomic categories together constitute?

According to the rules of nomenclature,what is written after the name of the species?

Define a taxon. What is meant by taxonomic hierarchy? Give a flow diagram from the lowest to highest category for a plant and an animal. What happens to the number of individuals and the number of shared characters as we go up the taxonomic hierarchy?