Final answer:
The cell theory states that all living organisms are composed of cells, cells are the basic units of structure and function, and cells only arise from pre-existing cells. All cells have a cell membrane, genetic material, and cytoplasm. Eukaryotic cells have a nucleus and organelles, while prokaryotic cells do not. The development of the cell theory demonstrates how science works and serves as an example of a scientific theory.
Step-by-step explanation:
- The cell theory, created through the combined work of Matthias Schleiden, Theodor Schwann, and Rudolf Virchow, states that all living organisms are composed of cells, cells are the basic units of structure and function in living organisms, and cells only arise from pre-existing cells.
- Three things all cells have in common are cell membranes, genetic material (DNA or RNA), and cytoplasm where cellular processes occur.
- Eukaryotic cells have a membrane-bound nucleus and membrane-bound organelles, while prokaryotic cells do not have a nucleus or membrane-bound organelles.
- The cell theory is a good example of how science works because it was developed through careful observation, experimentation, and the accumulation of evidence over time.
- The cell theory is a good example of what a theory is in science because it is a well-supported explanation that has been tested and proven by multiple scientists through experimentation and observation.