Nicotiana is

$A$ group of plants with similar traits of any rank is known as:

Which of the following taxonomic categories combine to form a Phylum?

Linnaeus is considered the Father of Taxonomy. Name two other botanists known for their contribution to the field of plant taxonomy.

$A :$ Scientific names for plants have been standardized through $ICBN$.
$R :$ Naming system which uses three-word format was given by Linnaeus.

Write a short note on the taxonomic categories (ranks) used in biological classification.