1 recipe Basic Burger, with whole-wheat buns. 2 ripe avocados. 2 tablespoons lemon juice. 2 tablespoons chopped fresh parsley. 2 tablespoons chopped fresh basil. 2 scallions, white and light green parts, sliced. 1 clove garlic, roughly chopped. 2 tinned anchovy fillets, rinsed, patted dry and chopped, optional.
1839 Although first seen by Robert Hooke in 1695 (he also first used the term cells), it wasn't until 1839 when Theodor Schwann and Mattais Schleiden first theorized that all plants and animals are made of cells in The Theory of Cells.
The first parts of cell theory were discovered in 1838. In 1853, the whole cell theory was discovered. Between the three germen scientists Theodor Schwann, Rudolph Virchow, Matthias Schleiden: they all discovered at least one part of the theory.