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Organism Meaning and Definition in Dictionary

Definitions from Wordnet 2.0

  • a living thing that has (or can develop) the ability to act or function independently
  • a system considered analogous in structure or function to a living body; "the social organism"

Definitions from Wiktionary

  • a living thing that has (or can develop) the ability to act or function independently ,
  • a system considered analogous in structure or function to a living body; "the social organism"

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Organism Meaning and Definition in Wikipedia

An organism is a living thing. It is easy to recognise a living thing, but not so easy to define it. Animals and plants are organisms, obviously. Organisms are a biotic, or living, part of the environment. Rocks and sunshine are parts of the non-living environment.

Organisms usually have five basic needs. They need air, water, nutrients (food), energy and a place to live. However, not all living things need all these at the same time. Many organisms do not need access to air at all.

A little thought is needed about viruses. There is no agreement as to whether they should be regarded as living. They are made of protein and nucleic acid, and they evolve, which is a really important fact. However, they exist in two quite different phases. One phase is dormant, not active. The other is inside a living cell of some other organism. Then the virus is very active reproducing itself. Consider the parallel with a computer program. When in use it is active; when it is not, it is completely inactive. It is still a program all the same.

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'Organism' example sentence in quotations

* It is an error to imagine that evolution signifies a constant tendency to increased perfection. That process undoubtedly involves a constant remodelling of the organism in adaptation to new conditions but it depends on the nature of those conditions whether the directions of the modifications effected shall be upward or downward. - Thomas Huxley

* Jean Grey Mutation. It is the key to our evolution. It has enabled us to evolve from a single-celled organism into the dominant species on the planet. This process is slow and normally taking thousands and thousands of years. But every few hundred millennia, evolution leaps forward. - X2 X-Men United

* All progress is based upon a universal innate desire on the part of every organism to live beyond its income. - Samuel Butler

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Organism Sample Sentences in News

  • 'Rewriting' the Way to Make Natural Drug Compounds
    Study shows that one way to solve problems of synthesis of natural compounds is to figure out how an organism solves the problem itself, and then modify it for a particular use. Read more on this news related to 'Organism'
  • Non-genetic changes can help parents or offspring, not both, researchers say
    A new study challenges current theory about how an organism changes physical characteristics because of its environment. Current theory says similar conditions will favor phenotype changes within and across generations of organisms. This experiment, which involved about 25 lineages of Daphnia, contradicts that thought. Read more on this news related to 'Organism'
  • First peek at how neurons multitask
    Researchers have shown how a single neuron can perform multiple functions in a model organism, illuminating for the first time this fundamental biological mechanism and shedding light on the human brain. Read more on this news related to 'Organism'

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