A bacterium (plural: bacteria) is an organism belonging to the domain bacteria (in the three domain scheme). Traditionally classified as one of the five kingdoms, bacteria are microscopic, single-celled and their cell structure is relatively simple. Since they lack the nucleus and organelles of the more complex cells called "eukaryotes", bacteria are considered to be "prokaryotes."

Prokaryotes | Bacteriology

Категория:Бактерии | Categoria:Bacteris | Kategorie:Bakterie | Kategori:Bakterier | Kategooria:Bakterid | Categoría:Bacterias | Catégorie:Bactérie | 분류:세균 | Categorie:Bacterie | Category:真正細菌 | Kategori:Bakterier | Kategoria:Bakterie | Categoria:Bactérias | Категория:Бактерии | Kategória:Baktérie | Kategorija:Bakterije | Luokka:Bakteerit | หมวดหมู่:แบคทีเรีย | Thể loại:Vi khuẩn | Category:細菌