Which microscope is used to see internal structures of cells in a natural state?

Check all that apply diatoms are marine algae that have a shell made of silica, what are some of the uses of the silica shell after the diatoms die? 1.the shells make up the diatomaceous earth used in filters 2.it can be used as an ingredient in abrasives 3.they are used in food products 4.the shells can be used in some insulating materials

What are the seven economic and social goals?

Explain how organisms could be harmed by high levels of salt from roadways?