Answer:
A microscope
Explanation:
He observed through a microscope and discovered cells.
Cells are the most basic units building units of life. All living things are composed of cells.
~Hope This Helped~
Continuous cell lines can be maintained through an indefinite number of generation :)
Since the circulatory system has to deliver oxygenated blood and take deoxygenated one for it to be oxygenated again, it cannot do the exchange by itself but depend on the respiratory system foe exchange........im no expert. just trying
Municipal waste is the waste generated by <u>Industries</u><u> </u>and commercial enterprises, such as markets and hotels. An example of municipal waste is <u>Solid</u><u> </u><u>waste</u><u>.</u>