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Robert Hooke
Robert Hooke discovered cells. -
Antoine van Leeuwenhoek
Used single-lens microscopes, to make the first observations of bacteria. His extensive research on the growth of small animals such as fleas,helped disprove the theory of spontaneous generation of life. -
Theodor Schwann
Founded modern histology by defining the cell as the basic unit of animal structure. -
Matthias Schlieden
Concluded that all plant tissues are composed of cells and that an embryonic plant arose from a single cell. -
Rudolph Virchow
Declared that every cell is derived from a preexisting cell. -
Gregor Mendel
Discovered the fundamental laws of inheritance. He deduced that genes come in pairs and are inherited as distinct units, one from each parent. -
William Bateson
the first person to use the term genetics to describe the study of heredity. -
Reginald Punnet
Made the punnet square to keep track of heredity. -
Gilbert N. Lewis
Discovered the covalent bond and the concept of electron pairs. -
Frederick Griffith
Showed us that bacteria can distinctly change their function and form through transformation. -
Oswald Avery
Made the experiment called the "Avery MacLeod McCarty" experiment in which he injected mice with s form and r form bacteria to show that DNA was able to transform bacteria. -
Sir Hans Adolf Krebs
Made the Krebs Cycle that is based on cellular respiration. -
Rosalind Franklin
Took x-ray diffraction images of DNA. -
James Watson and Francis Crick
The discovery in 1953 of the double helix, the twisted-ladder structure of deoxyribonucleic acid (DNA).