The basis of all life on Earth is the cell. All creatures on Earth are made up of cells. I’m not gonna dwell on the biology of cells and much is it not that relevant. But do want to point out a few things. First of all, there are 2 sorts of cells. As we think all the prokaryotic cell, which is fairly simple and it’s the thing that all bacteria are made of. And then we have a eukaryotic cell, much more complicated beasts on the right, which did not appear until well into the history of the biosphere on earth. And there are many single-celled eukaryotes. But there are also and importantly multicellular organisms and all of those are based on the eukaryotic cell.