1665-Robert Hook—Discovered Cell.
1674-Antony Van Leeuwenhock—For the first time observed sperms, bacteria, blood cells and Protozoa.
1828-Robert Brown—Described Brownian movements.
1831-Robert Brown—First to observe nuclei in flowering plant cell of Tradescantia
1835-Felix Dujardin—Named the jelly like living substance present within the protozoans as Sarcode.
1839- M.J. Schleiden and T. Schwann—Proposed the “Cell theory”.
1839- M. J. Schleiden—First described the nucleolus.
1840- J.E. Purkinje—Coined the term protoplasm.
1841- Robert Remark—First described amitosis.
1843- Claude—First recognized the ribosomes as basophilic granule rich in nucleic acids.
1855- Rudolf Virchow—Formulated the concept “Omnis Cellulae cellula”, i.e., all cells arise by the division of preexisting cells.
1863- Max Schultze stated that, ”protoplasm is the physical basis of life.”
1865- E. Haeckel—Named plastid and coined the term ‘Protista’.
1865- Valetta St. George—Coined the term cytomicrosome.
1869- F. Miescher First to isolated DNA (Nuclein) from pus cells.
1870- W. His Invented microtome section cutting.