Credit for developing cell theory is usually given to three scientists: Theodor Schwann, Matthias Jakob Schleiden, and Rudolf Virchow. In 1839. I found this answer on examville.com, helped me complete my homework assignment. Hope the information is useful.
Theodor Schwan in 1839.He also contributed in building cell theory.
Malthus
Cell Theory
Malthus
The theory of evolution was originally presented by Charles Darwin. Since the time of Darwin, there have been many other scientists who have contributed to evolutionary theory. One notable evolutionary scientist of the 21st century is Richard Dawkins.
Microscope
cell theory
Cell Theory
James Watson
Credit for developing cell theory is usually given to two scientists: Theodor Schwann and Matthias Jakob Schleiden. While Rudolf Virchow contributed to the theory, he is not as credited for his attributions toward it.
Schleiden and Schwann
Mendel