An organism is defined in a medical dictionary as any living thing that functions as an individual. Such a definition raises more problems than it solves...

unicellular organism, also known as a single-celled organism, is an organism that consists of a single cell, unlike a multicellular organism that consists...

A multicellular organism is an organism that consists of more than one cell, in contrast to unicellular organism. All species of animals, land plants and...

that discoveries made in the model organism will provide insight into the workings of other organisms. Model organisms are widely used to research human...

A microorganism, or microbe, is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells. The possible existence...

This article lists the largest organisms for various types of life and mostly considers extant species, which found on Earth can be determined according...

The HACEK organisms are a group of fastidious Gram-negative bacteria that are an unusual cause of infective endocarditis, which is an inflammation of...

A genetically modified organism (GMO) is any organism whose genetic material has been altered using genetic engineering techniques. The exact definition...

An anaerobic organism or anaerobe is any organism that does not require molecular oxygen for growth. It may react negatively or even die if free oxygen...

Male (symbol: ♂) is the sex of an organism that produces the gamete (sex cell) known as sperm, which fuses with the larger female gamete, or ovum, in the...

An aerobic organism or aerobe is an organism that can survive and grow in an oxygenated environment. The ability to exhibit aerobic respiration may yield...

A pest is any organism harmful to humans or human concerns. The term is particularly used for creatures that damage crops, livestock, and forestry or cause...

A juvenile is an individual organism (especially an animal) that has not yet reached its adult form, sexual maturity or size. Juveniles can look very different...

A digital organism is a self-replicating computer program that mutates and evolves. Digital organisms are used as a tool to study the dynamics of Darwinian...

The smallest organisms found on Earth can be determined according to various aspects of organism size, including volume, mass, height, length, or genome...

An organism's sex is female (symbol: ♀) if it produces the ovum (egg cell), the type of gamete (sex cell) that fuses with the male gamete (sperm cell)...

This is a list of the longest-living biological organisms: the individual(s) (or in some instances, clones) of a species with the longest natural maximum...

The meaning of terms that are used can change depending on whether an organism is bipedal or quadrupedal. Additionally, for some animals such as invertebrates...

A fastidious organism is any organism that has complex or particular nutritional requirements. In other words, a fastidious organism will only grow when...

cyber-organism, cyber-organic being, cybernetically enhanced organism or cybernetically augmented organism)—a portmanteau of cybernetic and organism—is a...

A pioneer organism, also called a disaster taxon, is an organism that colonizes a previously empty area first, or one that repopulates vacant niches after...

A facultative anaerobic organism is an organism that makes ATP by aerobic respiration if oxygen is present, but is capable of switching to fermentation...

-γενής, -genēs "producer of"), in the oldest and broadest sense, is any organism or agent that can produce disease. A pathogen may also be referred to as...

Organismic theories in psychology are a family of holistic psychological theories which tend to stress the organization, unity, and integration of human...

Eukarya or Eukaryota, organisms whose cells have a membrane-bound nucleus. All animals, plants, fungi, and many unicellular organisms are eukaryotes. They...

W.R.: Mysteries of the Organism (Serbo-Croatian: W.R. – Misterije organizma / W.R. – Мистерије организма) is a 1971 film by Serbian director Dušan Makavejev...

Maintenance of an organism is the collection of processes to stay alive, excluding production processes. The Dynamic Energy Budget theory delineates two...

(circumscribing) and classifying groups of biological organisms based on shared characteristics. Organisms are grouped into taxa (singular: taxon) and these...

In biology and medicine, a host is a larger organism that harbours a smaller organism; whether a parasitic, a mutualistic, or a commensalist guest (symbiont)...

be composed of two or more unitary (or solitary) organisms or be modular organisms. Unitary organisms have determinate development (set life stages) from...