Photosynthesis and cellular respiration are that occur in cells. chemical reactions physical reactions

There are six elements that make up most of the human body. which of the following is not one of these six elements?

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

Number and variety of living organisms includes genetic, species, and ecological types