1. Organization: Living things are highly organized, from the atomic level to the level of organ systems. This organization allows for efficient functioning.
2. Metabolism: All living organisms carry out chemical reactions to obtain and use energy, known as metabolism. This includes processes like photosynthesis and respiration.
3. Growth: Living things increase in size and complexity over time. This can involve an increase in the number of cells or an increase in the size of individual cells.
4. Adaptation: Living things can adjust to their environment through evolution. This includes changes in physical characteristics and behaviors that allow them to survive and reproduce.
5. Response to Stimuli: Living things are able to detect and react to changes in their environment, such as changes in temperature, light, or touch. This allows them to avoid danger and find resources.
6. Reproduction: Living things produce offspring to ensure the continuation of their species. There are different methods of reproduction, including sexual and asexual reproduction.
7. Homeostasis: Living things maintain a stable internal environment despite changes in the external environment. This involves regulating temperature, pH, and other vital factors.
These seven characteristics, while not an exhaustive list, are the core elements that define what it means to be alive. It's important to remember that the exact definition of life is still a subject of ongoing debate within the scientific community.
