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 …

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

Nov 30, 2021 · As such, the nature of life continues to be a hotly debated topic. This article focuses on the subject matter of biology: life. The first half of this article will focus on attempts to characterize life …

In this case, meaningful life (or meaning in life) is about ordering one’s life around self-determined purposes. We also distinguish actions done on purpose from those done by accident.

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 …

We are intimately familiar with life around us, because we’ve seen and interacted with them all our lives. But some forms of life went unrecognized for most of human history because they were impossible to …

The characteristics of life do not operate independently; rather, they are deeply interconnected and function together to sustain an organism. For instance, the energy processed through metabolism …

Life is the aspect of existence that processes, acts, reacts, evaluates, and evolves through growth (reproduction and metabolism). The crucial difference between life and non-life (or non-living things) …

Thus, the meaning of life is a belief about the purpose of life that does not contradict one's experience of a purposeful life. Roughly, this could be applied as: "The meaning of life is those purposes which …

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