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Scientists then used microscopes to develop which of the following major scientific theories?

A. The theory of thermodynamics
B. The cell theory
C. The theory of plate tectonics
D. The big bang theory

User Egurb
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1 Answer

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B the cell theory. this is because the cell was so small and darwin saw plant cells using a microscope in the form of a cell that is why the smallest unit of life was called the cell.

User Jinny
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