1. Cellular Structure: All living things are made up of one or more cells, the basic unit of life. This includes even microscopic organisms like bacteria.
2. Genetic Material: All living things contain DNA (deoxyribonucleic acid) as their genetic material. DNA carries the instructions for building and maintaining an organism, and it is passed down from parent to offspring.
3. Metabolism: All living organisms carry out a set of chemical reactions known as metabolism. This includes processes like obtaining energy from food, converting food into building blocks, and eliminating waste.
4. Growth and Development: Living organisms grow and develop over their lifespan, following a specific pattern determined by their genetic makeup.
5. Response to Stimuli: All living things respond to changes in their environment. These responses can range from simple movement away from light to complex behavioral adaptations.
6. Reproduction: Living organisms have the ability to reproduce, creating new individuals that carry on their genetic lineage.
7. Homeostasis: All living organisms maintain a stable internal environment, even when external conditions change. This is known as homeostasis.
8. Evolution: Living organisms are constantly evolving, adapting to their environments through changes in their genetic makeup over generations.
These fundamental similarities point to the fact that all life on Earth is interconnected and shares a common ancestor.
