Life
matter capable of extracting energy from the environment for replication / From Wikipedia, the free encyclopedia
For other uses, see Life (disambiguation).
Life is a concept in biology. It is about what separates a living thing from dead matter.
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Most life on Earth is powered by solar energy: the only known exceptions are the chemosynthetic bacteria living around the hydrothermal vents on the ocean floor. All life on Earth is based on the chemistry of carbon compounds, involving long-chain molecules such as proteins and nucleic acid. With water, which all life needs, the long molecules are wrapped inside membranes as cells. This may or may not be true of all possible forms of life in the Universe: it is true of all life on Earth today.