Which of the following is a real-world example of "all cells come from pre-existing cells?"


Cells combine to make tissues. Tissues combine to form organs. Organs combine to form organ systems. Organ systems combine to make organisms.




A water molecule forms when two hydrogen atoms combine with one oxygen atom.


A scientist looks at algae under a microscope and observes that it is made of cells.


A cut on your skin is healed after about a week of cell division in your skin.