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Organism. An organism is defined in a medical dictionary as any living thing that functions as an individual. [1] Such a definition raises more problems than it solves, not least because the concept of an individual is also difficult. Many criteria, few of them widely accepted, have been proposed to define what an organism is.
e. A microorganism, or microbe, [a] is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells. The possible existence of unseen microbial life was suspected from ancient times, such as in Jain scriptures from sixth century BC India.
Organicism. Organicism is the philosophical position that states that the universe and its various parts (including human societies) ought to be considered alive and naturally ordered, much like a living organism. [1][2] Vital to the position is the idea that organicistic elements are not dormant "things" per se but rather dynamic components in ...
In nature, many organisms live in communities (e.g., biofilms) that may allow for increased supply of nutrients and protection from environmental stresses. [52] These relationships can be essential for growth of a particular organism or group of organisms . [119] Bacterial growth follows four phases. When a population of bacteria first enter a ...
Eukaryotes are organisms that range from microscopic single cells, such as picozoans under 3 micrometres across, [6] to animals like the blue whale, weighing up to 190 tonnes and measuring up to 33.6 metres (110 ft) long, [7] or plants like the coast redwood, up to 120 metres (390 ft) tall. [8]
Humans are among the longest living land mammals. [99] Jeanne Calment, a French woman, lived to the age of 122 years, 164 days, making her the oldest fully documented human who has ever lived. She died on August 4, 1997. [100] Jiroemon Kimura (†116 years, 54 days), a Japanese man, died on 12 June 2013.
A unicellular organism, also known as a single-celled organism, is an organism that consists of a single cell, unlike a multicellular organism that consists of multiple cells. Organisms fall into two general categories: prokaryotic organisms and eukaryotic organisms. Most prokaryotes are unicellular and are classified into bacteria and archaea.
Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia (/ ˌænɪˈmeɪliə / [4]). With few exceptions, animals consume organic material, breathe oxygen, have myocytes and are able to move, can reproduce sexually, and grow from a hollow sphere of cells, the blastula, during embryonic development.