How does AIDS develop from an HIV infection?

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

Individuals do not compete directly for resources, but are prey for the same predator

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer