Living things:
* Organization: Living things are highly organized, with specialized cells and tissues working together to form organs and systems.
* Metabolism: They carry out chemical reactions to obtain and use energy (like eating, breathing, and photosynthesis).
* Growth and Development: Living things grow and change over time, following a specific life cycle.
* Adaptation and Evolution: They can adapt to their environment and evolve over generations to better survive.
* Response to stimuli: Living things react to changes in their environment (e.g., moving away from heat, seeking food).
* Reproduction: Living things produce offspring to ensure the continuation of their species.
Non-living things:
* Lack of organization: They are not made up of cells or organized into complex structures.
* No metabolism: They don't carry out chemical reactions for energy.
* No growth or development: They don't change over time in a way that suggests life.
* No adaptation or evolution: They don't change to better suit their environment.
* No response to stimuli: They don't react to their surroundings.
* No reproduction: They cannot produce offspring.
It's important to note that:
* Viruses: These are a bit of a grey area. They have some characteristics of living things, like evolving and replicating, but they lack others, like metabolism and independent growth.
* Complexity: The line between living and non-living can sometimes be blurry. For example, a crystal can grow, but it's not considered alive.
Ultimately, determining what is and is not alive is a matter of definition and the characteristics we consider essential for life.
