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  1. Mar 27, 2019 · Although biology is the study of life, even biologists don't agree on what 'life' actually is. While scientists have proposed hundreds of ways to define it, none have been widely accepted.

  2. digestion, sequence by which food is broken down and chemically converted so that it can be absorbed by the cells of an organism and used to maintain vital bodily functions. This article summarizes the chemical actions of the digestive process. For details on the anatomy and physiology for specific digestive systems, see digestive system, human, and digestive system, invertebrate. In order to ...

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    how do we define life in biology