Organism

(Redirected from Organisms)

Definition

noun, plural: organisms

An individual living thing that can react to stimuli, reproduce, grow, and maintain homeostasis


Supplement

An organism refers to any individual living thing that can react to stimuli, reproduce, grow, and maintain homeostasis. It can be a virus, bacterium, protist, fungus, plant or an animal. The earth is home to various organisms and these organisms can be classified taxonomically. There are eight major taxonomic levels: [domain]], kingdom, phyla, class, order, [family]], genus, and species. The three-domain system of biological classification as proposed by Carl Woese and others (in 1977) classifies organisms into the following domains: archaea (archaeabacteria), bacteria (eubacteria), and eucarya (eukaryotes). Both domains archaea and bacteria are prokaryotes.

Organisms may also be grouped based on their cellular composition. A single-celled organism is one that consists of only one cell. In contrast, a multicellular organism is one that is comprised of more than one cell and whose cells are organized into tissues, organs, and then into systems.


Word origin: Greek organon ("instrument")

Synonym(s):

See also:

Related term(s):

Retrieved from "http://www.biology-online.org/bodict/index.php?title=Organism&oldid=103430"
First | Previous (Organising centre) | Next (Organismal density) | Last
Please contribute to this project, if you have more information about this term feel free to edit this page.