Cells play an important role in the structure and function of organisms. which of the following is not a principle of the cell theory?
a. cells are the basic units of life.
b. all living things are made of cells.
c. very few cells reproduce.
d. all cells are produced by existing cells.

What evidence for the age of the earth is indicated by the fact that sedimentary rock is found on mountain tops? that the earth has expanded outward from water beds that mountains formed first before anything else that some force lifted the rocks from the water the earth is not very old and has not had time for many rock layers to form