1. Organization: Living organisms exhibit a high degree of organization, with cells as the basic unit. They have specialized structures (organs) that perform specific functions, and these structures are arranged in a hierarchical manner.
2. Metabolism: Living organisms carry out chemical reactions within their bodies, collectively known as metabolism. This includes processes like respiration, digestion, and biosynthesis.
3. Growth: Living organisms increase in size and complexity over time. This growth is often accompanied by an increase in the number of cells or the size of existing cells.
4. Response to Stimuli: Living organisms react to changes in their environment. These reactions can be simple, like a plant turning towards the sun, or complex, like a human responding to pain.
5. Reproduction: Living organisms have the ability to produce offspring, ensuring the continuation of their species. This can be through asexual or sexual reproduction.
6. Adaptation: Living organisms evolve over time in response to changes in their environment. These adaptations can be physical, behavioral, or physiological.
7. Homeostasis: Living organisms maintain a stable internal environment, despite fluctuations in the external environment. This involves regulating factors like temperature, pH, and water balance.
8. Movement: While not all living organisms are mobile, many exhibit some form of movement, whether it's the locomotion of animals or the growth and movement of plants.
9. Energy Utilization: Living organisms require and use energy to sustain life processes. This energy is derived from food (heterotrophs) or through photosynthesis (autotrophs).
10. Cellular Respiration: A fundamental process where living organisms break down organic molecules (like glucose) to release energy in the form of ATP. This energy powers various cellular activities.
It's important to note that some non-living things may exhibit one or two of these characteristics, but they never display all of them. This combination of life processes defines what makes something truly living.
