1. Organization: Living things are highly organized, with specialized structures (cells, tissues, organs) working together to maintain life. This is evident from the smallest bacteria to the largest whales.
2. Metabolism: Living things carry out a complex series of chemical reactions collectively called metabolism. This includes processes like obtaining and using energy, building and breaking down molecules, and eliminating waste.
3. Growth and Development: All living things grow and develop, increasing in size and complexity over time. This growth can be through cell division and expansion, or by adding new cells.
4. Reproduction: Living things reproduce, creating offspring that inherit characteristics from their parents. This can be through sexual or asexual reproduction, ensuring the continuation of the species.
5. Response to Stimuli: Living things react to changes in their environment. These stimuli could be physical (temperature, light), chemical (food, toxins), or biological (presence of predators or prey).
6. Homeostasis: Living things maintain a stable internal environment, even as the external environment changes. This is crucial for their survival and includes regulating temperature, water balance, and blood sugar levels.
7. Adaptation: Living things evolve over generations, adapting to their environment through natural selection. This means traits that increase an organism's chances of survival and reproduction become more common in a population.
8. Composed of Cells: All living things are composed of at least one cell. This is a fundamental unit of life, containing the basic building blocks of organisms.
It's important to note that these traits aren't necessarily unique to living things. Some viruses exhibit some of these characteristics, particularly reproduction and adaptation. However, viruses are not considered living organisms because they lack the capacity for independent metabolism and cellular organization.
