Dec 13, 2025 · Life-forms present on Earth today have evolved from ancient common ancestors through the generation of hereditary variation and natural selection.

LIFE definition: the condition that distinguishes organisms from inorganic objects and dead organisms, being manifested by growth through metabolism, reproduction, and the power of …

Life exists all over the Earth in air, water, and soil, with many ecosystems forming the biosphere. Some of these are harsh environments occupied only by extremophiles. The life in a particular …

LIFE meaning: 1. the period between birth and death, or the experience or state of being alive: 2. for the whole…. Learn more.

3 days ago · Your life is the time from your birth to your death — you can see this in its origins: "to remain, persevere, continue, live." Life is everything that happens: When people say, "That's …

If you refer to someone's life, you mean their state of being alive, especially when there is a risk or danger of them dying. Your life is in danger. A nurse began to try to save his life. The intense …

There are 40 meanings listed in OED's entry for the noun life, four of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Nov 30, 2021 · A wide range of practices rely on competing conceptions of life: including artificial life, origins-of-life research, the search for life, and other projects described above.

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 …

All groups of living organisms share several key characteristics or functions: order, sensitivity or response to stimuli, reproduction, adaptation, growth and development, regulation, …