Freud's term for a primitive, biological side of personality is called ID. The other terms he coined were ego and superego.
In 1869 Mendeleev put together the periodic table
Biologist study life at all levels of organization and complexity .atoms genes atom MOLECULE ,CELL,TISSUE,ORGANS,ORGANISM POPULATION, EARTH ,SOLAR SYSTEM AND GALAXIES
1- earth
2-Saturn
3-Uranus
4-Pluto
Schleiden proposed what would become known as the cell theory in 1838.
Louis Pasteur contributed to the cell theory by disproving spontaneous generation. He was the first scientist to prove that cells can only form from pre-existing cells.
Rudolf Virchows most widely known scientific contribution is that he backed up Schleidens previous discovery in 1838.