The answer is A
The development of the cell theory involved different ideas from different scientist.
To support my answer it was created to Matthias and Theodor,however, there were like many other scientists like Rudolf contributed to the theory.
I hope that's help:0
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Sorry to take up a answer but the picture is not in the correct format for brainly!!! Upload again so I can help.
Answer:
The three parts of the cell theory are: cells are the smallest unit of life; all cells come from preexisting cells; and living thing is made up of one or more cell.
