Observation 4 could be used to support all three parts of the cell theory.
Observation 4, which describes a paramecium covered with beating cilia, moving quickly through the water, could be used to support all three parts of the cell theory. The cell theory comprises three fundamental principles:
- All living organisms are composed of one or more cells.
- The cell is the basic structural and functional unit of life.
- All cells come from pre-existing cells through cell division.
Observation 4 provides evidence that supports these principles. The description of the paramecium with beating cilia indicates the presence of a single-celled organism with specialized structures (cilia) for movement and function. This aligns with the first part of the cell theory, emphasizing that living organisms are composed of cells.
The fact that the paramecium is moving quickly through the water highlights the functional aspect of the cell. Cells are not only structural units but also functional entities that carry out various activities necessary for life. This corresponds to the second part of the cell theory, emphasizing the cell as the basic structural and functional unit of life.
Finally, the dynamic process of the paramecium moving quickly through the water underscores the concept of cell division and the generation of new cells from pre-existing ones. This supports the third part of the cell theory, stating that all cells come from pre-existing cells through cell division.