Two similar holotypes are called

After which term and in what manner is the name of the author who described the species mentioned in biological nomenclature?

The most recent branch of taxonomy is:

In the given diagram,what do the labeled parts $P$ and $Q$ represent respectively?

Kingdom

$\uparrow$

$P$

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Class

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Order

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$Q$

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 $Homo$.

Define a taxon. Give some examples of taxa at different hierarchical levels.