Question

which is a component of the modern cell theory that was not part of the original cell theory?
○ all organisms are made of cells.
○ all cells are similar in composition and metabolic activities.
○ all cells come from preexisting cells.
○ a cell is the basic unit of structure and function for all living things

Explanation:

The original cell theory (proposed by Schleiden, Schwann, and later modified by Virchow) included that all organisms are made of cells, all cells come from pre - existing cells, and the cell is the basic unit of structure and function. The idea that all cells are similar in composition and metabolic activities is a part of modern cell theory that was not in the original. The other options were part of the original cell theory.

Answer:

B. All cells are similar in composition and metabolic activities.