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Life | Definition, Origin, Evolution, Diversity, Facts | Britannica Life comprises individuals, living beings, assignable to groups (taxa) Each individual is composed of one or more minimal living units, called cells, and is capable of transformation of carbon -based and other compounds (metabolism), growth, and participation in reproductive acts
Life - Evolution, Diversity, Biology | Britannica Life - Evolution, Diversity, Biology: The existence of diverse definitions of life, as detailed in the previous section, surely means that life is complex and difficult to briefly define A scientific understanding of living systems has existed since the second half of the 19th century
Life - Simple English Wikipedia, the free encyclopedia Life is a concept in biology It is about what separates a living thing from dead matter Most life on Earth is powered by solar energy: the only known exceptions are the chemo-synthetic bacteria living around the hydrothermal vents on the ocean floor
Origin and evolution of life | Britannica - Encyclopedia Britannica life, Matter characterized by the ability to metabolize nutrients (process materials for energy and tissue building), grow, reproduce, and respond and adapt to environmental stimuli The oldest fossil evidence of Earth’s first living organisms, bacteria and cyanobacteria, dates to about 3 5–3 7 billion years ago
Life on Earth - NASA Science NASA studies life on Earth from above, tracking ecosystems and observing changes in the diversity of plants and animals Building knowledge of our planet’s living systems allows us to steward our resources and protect vital landscapes, while gaining insights that can guide the search for life beyond our world
Life - Stanford Encyclopedia of Philosophy Open a textbook in biology and you’ll find a purported definition of life, usually in the form of a list of characteristics that apply to organisms, their parts, their interactions, or their history Often these definitions will be nothing more than descriptions or rely on more controversial theoretical commitments
Life - New World Encyclopedia A difficult term to define, life can be considered the characteristic state of living organisms and individual cells, or that quality or property that distinguishes living organisms from dead organisms and inanimate objects