What are the three components of the cell theory?

• A. All cells contain DNA, cells are the basic unit of life, and all cells are identical
• B. All cells reproduce asexually, cells are the basic unit of life, and all cells arise from pre-existing cells
• C. All living things are composed of cells, cells are the basic unit of life, and all cells arise from pre-existing cells
• D. All cells have membrane-bound organelles, cells divide through binary fission, and all cells arise from pre-existing cells

Answer: (C)

The three components of the cell theory, which is fundamental to understanding biology, emphasize the importance of cells in living organisms. The first component states that all living things are composed of cells, highlighting that cells are the basic building blocks of life. The second component asserts that cells are the basic unit of life, indicating that all life functions occur within cells. The third component states that all cells arise from pre-existing cells, which underscores the process of cellular division and continuity of life.

This framework distinguishes itself from the other options, which either introduce inaccuracies or irrelevant details. For example, while it's true that many cells reproduce asexually or that some cells possess membrane-bound organelles, these points do not capture the essential principles outlined in cell theory. Thus, option C correctly encapsulates the foundational tenets of cell theory, making it the accurate choice.