More complex = require more systems for life processes

Less complex = lack some or most of the complex systems

Non-living = some carry on living life processes, but not all of them, or the activities do not interact in a manner used for reproduction.

Living things- Components- organs systems to cell organelles, interact to maintain balanced environment

Balance = dynamic equilibrium or *homeostasis

Non-living = few controls for balance

Balance is done by special mechanisms that note changes, and restore the balance

Balance when not done = disease or death