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Life

From Wikipedia

coral-reef

Life is a characteristic that distinguishes objects that have self-sustaining biological processes (“alive,” “living”), from those which do not [1][2] —either because such functions have ceased (death), or else because they lack such functions and are classified as “inanimate.”

In biology, “life” (cf. biota) is a quantitative and qualitative characteristic of all functioning organisms — (excluding viruses, cf. “non-cellular life“) —such that exhibit continued self-sustaining (biological) processes.[3] A diverse array of living organisms (life forms) can be found in the biosphere on Earth. Properties common to these organisms—plants, animals, fungi, protists, archaea, and bacteria — are a carbon– and water-based cellular form with complex organization and heritable genetic information. They undergo metabolism, maintain homeostasis, possess a capacity to grow, respond to stimuli, reproduce and, through natural selection, adapt to their environment in successive generations. More complex living organisms can communicate through various means.[1][4]

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