Why is dissolved oxygen important for marine organisms?

The rate at which molecules water and oxygen can enter a cell is determined by the-

Complete the possible outcomes for each generation in the pedigree chartaa aa aa

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