Periods
Robert brown
In 1933 Robert Brown wrote a paper defining the nucleus inside plant cells.Rudolph Virchow
In 1845, Rudolph Virchow carried out the first systematic autopsies involving microscopic examination of tissueAnton van Leeuwenhoek
In 1665 Robert Hooke used one of Anton's microscope lenses to show life through a microscope.Edmund Wilson
In 1905 Wilson advanced the theory of sex determination by chromosomes,
By publishing his paperLouis Pasteur
In 1848 he made the discovery that many of
the molecules made in
nature is either left- or right-handed.Matthias Schleiden
In 1836 he successfully isolated and
named this additional substance:
he had discovered the enzyme pepsin.Henri Dutrochet
In 1826 he discovered osmosis in cellsLorenz Oken
In 1822, Oken's books were printed
and reprinted until the principles of cell theory,
established by Theodor Schwann,
superseded his work.Theodor Schwann
In 1838, he verified the existence of cells,
but he traced the development of
many adult tissues from early embryo stages.Felix Dujardin
In 1834, He made the suggestion
of a new family called Rhizopods.Robert Hooke
In 1665, Hooke’s examination
of the structure of cork led
to his coining the usage of the word cell.Hans, Zacharias
Janssen
In the 1590s these brothers created the
compound optical microscopeMax Schultz
In 1861 he was able to establish
that cells of all organisms contain protoplasm.Johannes Purkinje
In 1839, Purkinje was the first to use the
term "protoplasm" in a scientific sense.In 1664, He was closely related
to the doctrine of the circulation of the blood.Barthelemy Dumortier
In 1832 Barthelemy Dumortier described "binary fission"(cell division) in plants.Walther Flemming
In 1879, Observing the chromatin at
different phases, he traced the
process of cell division, calling it mitosis.
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