1. Growth and Reproduction: Unicellular organisms exhibit growth by increasing in size and complexity. They reproduce asexually, often through binary fission, where they divide into two identical daughter cells. This demonstrates a fundamental characteristic of life - the ability to reproduce and pass on genetic information.
2. Response to Stimuli: Unicellular organisms, despite their simplicity, can respond to their environment. For example, some amoeba will move towards food sources (chemotaxis), while others will move away from harmful substances (chemotaxis). This responsiveness demonstrates a fundamental characteristic of life - the ability to sense and react to changes in their surroundings.
These characteristics are observable in many unicellular organisms, such as bacteria, amoeba, and paramecium. They highlight the basic building blocks of life and demonstrate how even the simplest organisms can exhibit complex behaviors.
