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Non-cellular life, also known as acellular life, is life that exists without a cellular structure for at least part of its life cycle. [1] Historically, most definitions of life postulated that an organism must be composed of one or more cells, [2] but, for some, this is no longer considered necessary, and modern criteria allow for forms of life based on other structural arrangements.
Microbiology (from Ancient Greek μῑκρος (mīkros) 'small' βίος (bíos) 'life' and -λογία () 'study of') is the scientific study of microorganisms, those being of unicellular (single-celled), multicellular (consisting of complex cells), or acellular (lacking cells).
Cellular microbiology is a discipline that bridges microbiology and cell biology. The term "cellular microbiology" was coined by the authors of the book of the same title published in 1996. [ 1 ] Cooperation and mutual dependency between microbiology and cell biology had been increasing in the years before that, and the emergence of a new ...
Using microorganisms to produce foods, for example by fermentation. Agricultural microbiology: the study of agriculturally relevant microorganisms. This field can be further classified into the following: Plant microbiology and Plant pathology: The study of the interactions between microorganisms and plants and plant pathogens.
Fruiting gliding bacteria Hydrobacteria "Deferrisomatota" Desulfobacterota C Hydrobacteria "Deferrimicrobiota" Begmatov et al. 2022 Desulfobacterota E "Tharpellota" Hydrobacteria "Moduliflexota" corrig. Sekiguchi et al. 2015 KSB3 Hydrobacteria "Methylomirabilota" Viljakainen & Hug 2021ex Chuvochina et al. 2023 NC10 "Rokubacteria" (CSP1-6 ...
There are broadly speaking two different types of cell wall in bacteria, that classify bacteria into Gram-positive bacteria and Gram-negative bacteria. The names originate from the reaction of cells to the Gram stain, a long-standing test for the classification of bacterial species. [75] Gram-positive bacteria possess a thick cell wall ...
The oral microbiota consists of all the microorganisms that exist in the mouth. It is the second largest of the human body and made of various bacteria, viruses, fungi and protozoa. [14] These organisms play an important role in oral and overall health. Anthony Van Leeuwenhoek was the first to view these organisms using a microscope he created ...
Stentor coeruleus, used in molecular biology (its genome has been sequenced), [5] and is studied as a model of single-cell regeneration. Dictyostelium discoideum, used in molecular biology and genetics (its genome has been sequenced), and is studied as an example of cell communication, differentiation, and programmed cell death.