What are the three main components of the cell theory?

The three main components of the cell theory, as outlined in the correct choice, establish fundamental principles that capture our understanding of cellular biology. First, the assertion that all living things are made of cells highlights the essential role of cells as the building blocks of life, emphasizing that whether we look at plants, animals, or microorganisms, their structures and functions are fundamentally cellular.

Second, the statement that cells are the basic unit of life signifies that all vital processes—such as metabolism, growth, and reproduction—are carried out at the cellular level. This concept provides a clear distinction between living organisms and non-living entities, as only living organisms exhibit cellular organization.

Lastly, the principle that all cells come from pre-existing cells underscores the continuity of life through cellular division. This idea refutes the notion of spontaneous generation and establishes that new cells arise from the division of existing ones, which fosters an understanding of growth, development, and healing in living organisms.

These components collectively form the foundation of modern biology, guiding our exploration of the complexities of life at a cellular level. The other options fail to encapsulate these fundamental ideas, addressing aspects that are either inaccurate or not universally applicable to all living entities.