Through which microscope were cells first observed? simple microscope tunneling microscope compound light microscope electron microscope

Answer;

-Simple microscopes

Explanation;

-Microscope is an instrument for producing a magnified image of a small object. There are many types of microscopes, ranging from simple, single-lens instruments to compound microscopes and high-powered electron microscopes.

-Robert Hooke fine-tuned a compound microscope equipped with a course and fine focus. Robert Hooke improved the microscope, too, and explored the structure of snowflakes, fleas, lice and plants.

thinking it would be physical characteristics

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.