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Brain Rules for Aging Well - John Medina - Talks at GoogleLife is considered a characteristic of something that preserves, furthers or reinforces its existence in the given environment.
This characteristic exhibits all or most of the following traits: [18] [34] [35] [36] [37] [38] [39] Homeostasis : regulation of the internal environment to maintain a constant state; for example, sweating to reduce temperature Organization : being structurally composed of one or more cells — the basic units of life Metabolism : transformation of energy by converting chemicals and energy into cellular components anabolism and decomposing organic matter catabolism. Living things require energy to maintain internal organization homeostasis and to produce the other phenomena associated with life.
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Growth : maintenance of a higher rate of anabolism than catabolism. A growing organism increases in size in all of its parts, rather than simply accumulating matter. Adaptation : the ability to change over time in response to the environment. This ability is fundamental to the process of evolution and is determined by the organism's hereditydiet, and external factors.
Response to stimuli : a response can take many forms, from the contraction of a unicellular organism to external chemicals, to complex reactions involving all the senses of multicellular organisms. A response is often expressed by motion; for example, the leaves of a plant turning toward the sun phototropismand chemotaxis.
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Reproduction : the ability to produce new individual organisms, either asexually from a single parent organism or sexually from two parent organisms. These complex processes, called physiological functionshave underlying physical and chemical bases, as well as signaling and control mechanisms that are essential to maintaining life.
Alternative definitions See also: Entropy and life From a physics perspective, living beings are thermodynamic systems with an organized molecular structure that can reproduce itself and evolve as survival dictates. One systemic definition of life is that Byy things are self-organizing and autopoietic self-producing. Variations of this definition include Stuart Kauffman 's definition as an autonomous agent or a multi-agent system capable of reproducing itself or themselves, and of completing at least one thermodynamic work cycle. They are most often considered as just gene coding replicators rather than forms of Life Challenges: Brain Rules By John Medina.
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However, viruses do not metabolize and they require a host cell to make new products. Virus self-assembly within host cells has implications for the study of the Challnges: of lifeas it may support the hypothesis that life could have started as self-assembling organic molecules. Biophysicists have commented that living things function on negative entropy. These systems are maintained by flows of information, energyand matter. Definition of cellular life according to BudisaKubyshkin and Schmidt. This system is able to regulate and control metabolism and energy supply and contains at least one subsystem that functions as an information carrier genetic information.
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Cells as self-sustaining units are Live of different populations that are involved in the unidirectional and irreversible open-ended process known as evolution. Instead of examining phenomena by attempting to break things down into components, a general living systems theory explores phenomena in terms of dynamic patterns of the relationships of organisms with their environment. Inhe stated that the Earth was a superorganism and that its proper study should be physiology. Hutton is considered the father of geology, but his idea of a living Earth was forgotten in the intense reductionism of the 19th century.]
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