Question:
The ascending or descending arrangement of taxonomic categories is called as
The ascending or descending arrangement of taxonomic categories is called as
Updated On: Jul 7, 2022
- classification
- taxonomy
- hierarchy
- key
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The Correct Option is C
Solution and Explanation
Hierarchy of categories is the classification of organisms in a definite sequence of categories (taxonomic categories) in a descending order starting from kingdom and reaching upto species or an ascending order from species to kingdom. The number of similar characters of categories decreases from lowest rank (species) to highest rank (kingdom). The taxonomic hierarchy includes seven obligate categories-kingdom, division or phylum, class, order, family, genus and species. Some subcategories like tribe, subfamily, subspecies are also used whenever required.
Fig: Taxonomical hierarchy showing arrangement in ascending order
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Concepts Used:
Nomenclature and Taxonomy
A branch of science that deals with the nomenclature, identification, and classification of living organisms and extinct organisms is known as taxonomy. We have millions of species on Earth that are commonly known by their local names.
The nomenclature of an organism is only possible when we correctly know all the specifications of the organism that describes them clearly. The described process of an organism is known as identification.
Rules for the Binomial Taxonomy Nomenclature:
- Irrespective of their origin, these biological names are derived from Latin words and are written in italics.
- ‘Genus’ - is the first word in the biological name whereas the second word represents a specific epithet.
- To show the Latin origin both the genus and specific epithet are separately underlined or written in italics.
- With capital letters, the genus should start and with a small letter, a specific epithet starts.
- The name of the author should be written in the abbreviated form after the specific epithet which denotes the name of the person who described the species such as Mangifera indica Linn. In this Linn indicates the Biologist Linnaeus who for the very first time described the species of mango.