Content code
s1221
Slug (identifier)
taxonomy
Parent content
Ecology
Grades
Secondary I
Secondary II
Topic
Science and Technology
Tags
La classification des vivants
La taxonomie
protiste
champignon
embranchement
Content
Contenu
Content
Corps

Taxonomy is the science that studies the classification of living organisms into different categories, according to strict rules that take into account physical and genetic characteristics.

Corps

Formerly, living organisms were classified into 2 categories: animals and plants. Today, this classification has evolved. There are now 5 categories called kingdoms.

The kingdoms of living organisms are:

Kingdom Example Cellular organization  Number of known species
Moneras Les monères
  • Unicellular organisms
  • No nucleus
 Around 3 000 species
Protists Les protistes
  • Unicellular organisms
  • Presence of a nucleus and other organelles
 Around 31 000 species
Fungi Les champignons
  •  Majority of multicellular organisms
  • Certain unicellular organisms (e.g. yeasts)  
 About 150 000 species
Plants Les végétaux
  • Multicellular organisms
 Around 300 000 species
Animals Les animaux
  • Multicellular organisms
  Around 1 200 000 species
Columns number
2 columns
Format
50% / 50%
First column
Corps

Each kingdom is divided into categories, which, in turn, are divided into other categories and so on. In all, there are 7 levels of subdivisions called taxa. These taxa are, from the most general to the most specific, the kingdom, phylum, class, order, family, genus and species.

Second column
Image
The classification system of living organisms (taxonomy)
Title
Taxa
Corps

The 7 levels to which a living being belongs can be shown in what is called a taxonomic key.

Content
Columns number
2 columns
Format
50% / 50%
First column
Image
Iris versicolor
Title
Iris versicolor
Second column
Corps

Kingdom: Plant
Phylum: Magnoliophyta  
Class: Liliopsida  
Order: Asparagales  
Family: Iridaceae  
Genus: Iris  
Species: Iris versicolor

Content
Columns number
2 columns
Format
50% / 50%
First column
Image
E. coli
Title
E. coli
Second column
Corps

Kingdom: Monera
Phylum: Proteobacteria  
Class: Gammaproteobacteria  
Order: Enterobacteriales  
Family: Enterobacteriaceae  
Genus: Escherichia  
Species: Escherichia coli

Content
Columns number
2 columns
Format
50% / 50%
First column
Image
The common starfish
Title
The common starfish
Second column
Corps

Kingdom: Animal
Phylum: Echinoderms
Class: Asterias
Order: Forcipulatida  
Family: Asteriidae  
Genus: Asterias  
Species: Asterias rubens

Corps

For each of the 7 taxa, there are sub-categories: subclass, superclass, subphylum, etc.

Content
Corps

The domestic cat is a subspecies of cats.

Columns number
2 columns
Format
50% / 50%
First column
Image
The domestic cat
Title
The domestic cat
Second column
Corps

Kingdom: Animal
Phylum: Chordates
Subphylum: Vertebrates
Class: Mammals
Order: Carnivores
Suborder: Feliformia  
Family: Felidae  
Subfamily: Felinae  
Genus: Felis  
Species: Felis sylvestris  
Subspecies: Felis sylvestris catus

Remove audio playback
No