Kidney stones are little crystals that can be extremely painful.

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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

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

In which of the following relationships is one organism always benefited while the other organism is always harmed