In what types of countries do most nervous system disorders occur?

What are two reasons for why a species might disappear from the fossil record?

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

Why does it matter if osmosis is put into a “scab” or a “nosebleed? ” where would that leave him?