Here's a breakdown of what that means:
* Organization: Both types of organisms are organized, meaning they have a defined structure and internal order.
* Metabolism: Both carry out chemical reactions to obtain and use energy.
* Growth: Both increase in size and complexity.
* Responsiveness: Both react to stimuli in their environment.
* Reproduction: Both produce offspring, either through asexual or sexual means.
* Adaptation: Both are capable of evolving and adapting to their surroundings.
While single-celled organisms are often considered "simple," they perform all the functions of life within a single cell. Multicellular organisms, on the other hand, rely on specialization of cells to perform different tasks and work together as a whole organism.
So, while the complexity of their organization and structure differs significantly, both single and multicellular organisms share the fundamental characteristics of life.