Bacteria that is cause disease in other organisms are called​

One of the largest seafood exporters to the united states is a. china b. brazil c. mexico d. saudi arabia

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

In general, are there any major differences that you can see? explain