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 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...

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

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

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...

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

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...

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