he stated that inheritance was only a function of the sex cells, and from this, one of the central dogmas of modern biology; that the germ-line cells create both somatic cells and other sex cells. He made discoveries regarding germ plasm http://www.lycos.com/info/august-weismann.html
He contributed in the cell theory, he was the first to discover leukemia cells. He was one of the first to agree with Robert Remak who showed that the origins of cells was the division of preexisting cells. http://en.wikipedia.org/wiki/Rudolf_Virchow
He discovered that animal plants are viewed under a microscope. He worked on Rudolf Virchow's theory and concluded the cell theory that states "that all living organisms have a basic unit of structure and function, which is the cell. This was a biologically significant statement because it suggested that all living things have a common denominator." http://www.schools.utah.gov/CURR/SCIENCE/sciber00/7th/cells/sciber/cellhist.htm
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