1. Organization:
* Cellular Structure: All living organisms are composed of one or more cells, the basic unit of life.
* Hierarchy of Organization: Cells are organized into tissues, organs, organ systems, and ultimately, into the complete organism.
2. Metabolism:
* Energy Transformation: Living things constantly take in energy from their environment and transform it to maintain their internal processes, growth, and reproduction.
* Chemical Reactions: Metabolism involves a complex network of chemical reactions that break down substances for energy and build up new molecules.
3. Growth and Development:
* Increase in Size: Living organisms increase in size and complexity over time.
* Differentiation: Cells differentiate into specialized types with specific functions, contributing to the organism's development.
4. Reproduction:
* Passing on Genetic Information: Living organisms produce offspring that inherit their genetic material.
* Types of Reproduction: This can be sexual (involving two parents) or asexual (involving a single parent).
5. Response to Stimuli:
* Adaptation: Living organisms are capable of responding to changes in their environment, which helps them survive.
* Homeostasis: They maintain a stable internal environment despite fluctuations in the external environment.
6. Adaptation and Evolution:
* Genetic Variation: Differences in genes within a population lead to variations in traits.
* Natural Selection: Individuals with traits better suited to their environment are more likely to survive and reproduce, passing on those advantageous traits to future generations.
7. Heredity:
* Genetic Material (DNA/RNA): Living organisms contain genetic information encoded in DNA or RNA, passed down from parents to offspring.
* Continuity of Life: This genetic material ensures the continuity of life and its characteristics across generations.
It's important to note that these properties are not always present in all life forms at the same time, or in the same degree. For example, some organisms may not reproduce sexually, or they might lack some of the complex organizational structures found in more advanced organisms. However, these properties represent the common ground that defines life in its various forms.
