What is Life?

Bacteria are alive, viruses are not.

(Click on the image if you want to understand bacterial motility.)

The term 'life' embraces the notion of utilization of energy sources to drive biochemical self-replication.

Viruses are not alive because they cannot self-replicate. They reproduce only by usurping the machinery of live cells.

Abiogenesis simply required that an assembly of molecules and macromolecules acquired the ability to convert energy into growth and self-replication (directed by informational macromolecules).

Terrestrial life arose through abiogenesis and was solely bacterial for billions of years. Biological evolution acted upon the malleable product and the evolution of oxygenic photosynthesis enabled greater biological complexity.

If it were not for religions, all intelligent, moderately educated people could agree on the facts.

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