What are the 3 parts of of the modern day cell theory ?

Average annual precipitation and are the two major features that define the biomes on earth.

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

What does natural resource management aim at ?