Bacteria cells are prokaryotic...
Difference than other cells
1) They do not have a well organized nucleus
2) They do not have a membrane bound organelles
3) They do not have the cell wall.
I would go with ''mechanical weathering'' since that makes rock turn smaller and smaller due to the weather.
The best source of information for deciding whether a product meets your needs would be to check the product's labels as it lists all the contents it has and what you will get from consuming it, therefore checking the labels on products is the best way as you can see right away if it has what you need
