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 ecosystem …

Jan 21, 2026 · Life-forms present on Earth today have evolved from ancient common ancestors through the generation of hereditary variation and natural selection.

The meaning of LIFE is the quality that distinguishes a vital and functional being from a dead body. How to use life in a sentence.

The meaning of life can be derived from philosophical and religious contemplation of, and scientific inquiries about, existence, social ties, consciousness, and happiness.

Jan 21, 2026 · 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 …

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Nov 30, 2021 · In the Phaedrus, Timeaus, and Republic, Plato divided life into three parts: vegetable life, animal life, and rational life. All living creatures possessed the first in the form of nutrition and …

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

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 …

NASA defines life as a self-sustaining chemical system capable of biological evolution. A key part of any definition of life is that living organisms reproduce. Let’s now add a couple of observations: …