The cohesion-tension theory proposes that water rises through plants because of

Why should the united state be concerned about air pollution in china?

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

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.