- Life is a characteristic distinguishing physical entities having biological processes, such as signaling and self-sustaining processes, from those that do not, either because such functions have ceased, or because they never had such functions and are classified as inanimate
Life Net worth 2024 (estimated)
| How much is Life worth? | Under review
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Life facts
- Various forms of life exist such as plants, animals, fungi, protists, archaea, and bacteria
- The criteria can at times be ambiguous and may or may not define viruses, viroids or potential artificial life as living
- Biology is the primary science concerned with the study of life, although many other sciences are involved
- The definition of life is controversial
- The current definition is that organisms maintain homeostasis, are composed of cells, undergo metabolism, can grow, adapt to their environment, respond to stimuli, and reproduce
- However, many other biological definitions have been proposed, and there are also some borderline cases, such as viruses
- Biophysicists have also proposed some definitions, many being based on chemical systems
- There are also some living systems theories, such as the Gaia hypothesis, the idea that the Earth is alive; the former first developed by James Grier Miller
- Another one is that life is the property of ecological systems, and yet another is the complex systems biology, a branch or subfield of mathematical biology
- Some other systemic definitions includes the theory involving the darwinian dynamic, and the operator theory
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