Respuesta :
Microscope. All the scientists used microscope because it can see very small particles. The theory of cell was propounded by Robert Hooke(1665), Dujardin(1835), Mathias Schleiden(1838) and Theodor Schwann(1839)
Answer:
B
Explanation:
This is a easy question but I can see why you may have trouble with this the microscope is used to look very closely at objects yes all the other can look closely but a microscope looks very closely