Which option correctly lists the three classic tenets of cell theory in the history of cell biology?

• A. All living organisms are composed of cells; genes are located on chromosomes; evolution occurs by natural selection.
• B. All living organisms are composed of one or more cells; the cell is the basic unit of structure and function in living things; all cells arise from pre-existing cells.
• C. Cells are bounded by a plasma membrane; cells contain mitochondria; cells divide only by mitosis.
• D. All cells contain a nucleus; all organisms are multicellular; all cells arise spontaneously from nonliving matter.

Answer: (B)