The Cell Theory 1. All living things are made of cells. 2. Cells are the basic units of life. 3. Cells come only from other cells. Protocells: One theory of the origins of cells states that the first life on earth consisted of several types of tiny protocells, cell-like organisms. These organisms were able to survive and reproduce in a very limited environment because of their simplicity. Over time, some of these protocells came together and shared their …showed first 75 words of 610 total…

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