1. Organization: Living things are highly organized, with specialized cells, tissues, organs, and organ systems. This organization allows them to carry out complex functions.
2. Metabolism: Living things require energy to maintain their organization and carry out life processes. They obtain this energy through metabolism, a set of chemical reactions that break down food and release energy.
3. Growth: Living things increase in size and complexity over time. This growth is often accompanied by changes in form.
4. Reproduction: Living things produce offspring, ensuring the continuation of their species. Reproduction can be sexual or asexual, depending on the organism.
5. Responsiveness: Living things respond to stimuli in their environment. This could be a physical change, like temperature, or a chemical change, like the presence of food.
6. Adaptation: Living things have the ability to evolve over time, adapting to changes in their environment. This adaptation allows them to survive and reproduce in a changing world.
7. Homeostasis: Living things maintain a stable internal environment, even when the external environment changes. This is called homeostasis and is essential for survival.
These are the core characteristics that define life. While some organisms might not exhibit all these characteristics at all times (for example, a seed isn't growing or reproducing), they all possess the potential to do so, making them living.
