How does the whole question go?
Fire can not burn without oxygen
The answer should be proteins. Because the protein is consists of different kinds of amino acids(usually 20 in total). And our cell can not produce essential amino acids itself.
Answer:
species.
Explanation:
Taxonomy can be defined as the process of naming, classification and description of living organisms such as plants and animals. Thus, it is the biological classification of living organisms based on similarities or characteristics such as eyes, number of legs, etc.,
The eight (8) biological classification (taxonomy) used for grouping and organizing organisms are; kingdom, domain, phylum, family, order, class, genus and species.
In taxonomy, species refers to the basic unit of naming that includes members such as mammals and reptiles with the ability to reproduce with each other to birth new offsprings and exchange genetic informations. Some examples of species include Homosapiens, Vulpes, Elephas maximus, Pinus banksiana, Alces laces, Ursus americans, Canis lupus, etc.
In conclusion, taxonomy helps scientist to have good understanding and knowledge when studying various organisms.
