Question

The highest category in taxonomy is
A. Phylum
B. Class
C. Kingdom
D. Species

Answer 1

Hint: The science of naming all known organisms, including plants, animals and microorganisms of the world, is called taxonomy. The science of classification, description and classification. The seven main taxonomic ranks in order are as follows: kingdom, phylum or division, class, order, family, genus, species. Although not mentioned in any of the nomenclature codes, the domain category which was proposed by Carl Woese is also now widely used as a fundamental rank.

Complete answer:
Option A Phylum: This level of classification or taxonomic rank is below kingdom and above class. Phylum can be defined as a group of organisms with a certain degree of morphological or developmental similarity or with a certain degree of evolutionary relatedness. Since it is below the kingdom category, phylum is not the highest category.
Hence option A is not correct.
Option B Class: The taxonomy Class sits between categories of phylum and order. Until phyla were not introduced, class was the most general rank of the taxonomic hierarchy. Since class is between phylum and order, it is not the highest category in taxonomy.
Hence option B is not correct.
Option C Kingdom: The highest level of classification is kingdom. Taxonomic rank kingdom is divided into subgroups at various levels. Living organisms are classified into five kingdoms, namely, Animalia, Plantae, Fungi, Protista, and Monera. Since kingdom is the highest level of classification.
Option C is the correct answer.
Option D Species: The last category of taxonomy is known as species. On Earth, there are about a million different species. This category refers to a group of organisms that are of similar shape, form, reproductive features.
Hence, option D is incorrect.

So, Option C. Kingdom is the correct answer.

Notes:
Each class is categorized as more general categories of organisms and groups of organisms which are most interconnected by a legacy of features or characteristics of a common ancestor. The rank and description of any species and its genus is basic. It basically means that it is not necessary to specify ranks other than these first two to identify a particular organism.