1. Atoms: The basic building blocks of matter.
2. Molecules: Two or more atoms bonded together.
3. Organelles: Structures within cells that perform specific functions.
4. Cells: The fundamental unit of life.
5. Tissues: Groups of similar cells working together.
6. Organs: Structures made of different tissues that perform a specific function.
7. Organ Systems: Groups of organs working together to carry out a complex function.
8. Organism:** A complete living being, composed of organ systems.
Key characteristics of the organism level:
* Individuality: A single, independent living thing.
* Self-sustaining: Able to carry out all life processes (e.g., metabolism, growth, reproduction) on its own.
* Complex organization: Composed of multiple organ systems working together.
* Interdependence: Interacts with its environment and other organisms.
Examples of organisms:
* A single bacterium
* A mushroom
* A dog
* A tree
* A human
Understanding the organism level is crucial for comprehending how life functions, how organisms interact with each other, and how biological systems operate as a whole.
