Events
Hans and Zacharias Janssen
were a father and son duo that
created what is known as the
first microscope in 1590.Robert Hooke was the first scientist
to discover the microscope in 1665.
He discovered the cell by using
a microscope.In 1674, Anton van Leeuwenhoek first
discovered the existence of single
celled organisms by looking into pond
water through a microscopeBotanist Robert Brown
discovered the concept
that plant cells contain
a nucleus. He discovered
this in 1833.In 1838, Matthias Schleiden concluded
that cells make up plant tissue and
are the basic building block of all
plant matter. Schleiden is one of the
co-founders of the cell theory.Theodor Schwann looked at the ideas
created by Matthias Schleiden, and
was able to conclude a theory that all
tissues, both plant and animal, were
made up of cells. Schwann was one
of the co-founders of the cell theory.In 1855, Rudolph Virchow came
up with the theory that the origin
of cells came from the division of
pre-existing cells.Albert von Kölliker was the first scientist
to describe the mitochondria in 1857.In 1840, Albrecht von Roelliker concluded
that sperm and egg were also cells.Germ cells are haploid, chromosome
theory of heredity. This was determined
in 1883.
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