What are the contributions of Robert Hooke, Anton van Leuwenhoel Matthias Schleiden, Theodor Schwann, and Rudolph Virchow to our understanding of cells?

Eukaryotic cells are theorized to have evolved from prokaryotes called the endosymbiotic theory. this explains that the most primitive eukaryotic cell engulfed a prokaryotic cell (by the process of phagocytosis) that is capable of cellular respiration and another prokaryotic cell that is capable of photosynthesis. these prokaryotic cells eventually became organelles and these organelles are the mitochondria and the chloroplast