: The capacity to produce offspring, either sexually or asexually, to ensure the continuation of the species.
: 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) : The capacity to produce offspring, either sexually
: Life requires energy to function. Organisms either produce their own food (like plants) or consume others to fuel biological processes. : The capacity to produce offspring
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: either sexually or asexually
: Living things increase in size or complexity over time throughout their lifespan.