Alive

In science, "alive" refers to organisms that perform specific vital functions. While there is no single perfect definition, biologists generally agree on seven key characteristics that distinguish living things from non-living matter:

: All living things are composed of one or more cells, which contain DNA and organized structures. In science, "alive" refers to organisms that perform

: Life requires energy to function. Organisms either produce their own food (like plants) or consume others to fuel biological processes. In science, "alive" refers to organisms that perform

: Over generations, populations of living things change to better survive in their specific environment. 2. The Human Experience: What It Means to "Feel Alive" What Really Makes Us Feel Alive (And Why We've Forgotten) In science, "alive" refers to organisms that perform

: Living things increase in size or complexity over time throughout their lifespan.