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What is 1 + 3?
scientist from first semester biology
the first scientist to identify cells, and he names them. he also contributed to the first part of the cell theory.
observed cells in greater detail, because he made better lens.
1st to note ALL plants were made of cells
concluded all animals are made of cells, combined his and schleiden's theory to form the 1st part of the cell theory
proposed all cells came from other pre existing cells (2nd part of the cell theory)
produced X-ray photographs that indicated DNA was a double helix. the DNA appeared as a circle with an x running thorught it (X)
Watson and Crick
made a model of DNA. Discovered DNA was a "double helix model"
created the base pairing rules
3rd part of cell theory--> all cells come from pre-existing cells