As diatoms are made from silica this makes diatomaceous earth very abrasive, and so the sharpness enhances the particles as a pesticide. Diatoms are also useful in forensic studies. If a person has drowned then diatoms are able to enter the human body.
I think the answer is the Eukaryote Kingdom. I hope this helps (:
The three types of chemical bonds are Ionic, Covalent, and Metallic
