Who wants to be my boy frind for 71 points im 13

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

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content

Amines amides and amino acids are categories of