How did more sophisticated microscope have allowed scientists to advance their knowledge of cells?

the answer is: metamorphic rocks often show the presence of fossils, also a

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answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]