Name the scientists responsible for Nucleus Discoveries

Name the scientists responsible for following discoveries:

  1. Nucleus in cell.
  2. Term protoplasm for the fluid substance of a cell.
  3. All cells arise from pre-existing cells.
  1. Robert Brown discovered nucleus in the cell.
  2. Purkinje in 1839 coined the term ‘protoplasm’ for the fluid substance of a cell.
  3. Virchow in 1855 stated that all the cells arise from pre-existing cells.