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Robert Hooke

Theodor Schwann

Bacteria

Unicellular has one cell and multicellular has more than one cell

5

The basic building blocks of all living things

Microscope

living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells.

Virchow used the theory that all cells arise from pre-existing cells to lay the groundwork for cellular pathology

He created the single lens microscope,he did a lot a research on small animals such as fleas. He helped disprove the theory of spontaneous generation.

This type of galaxy is an approximately ellipsoidal shape and a smooth, nearly featureless image. they are the largest single star systems, in the universe and are built by the collisions of many smaller galaxies.

Ihaven't done that yet, so no idea,but this is not the right place to ask