Which Factor listed below is biotic. Bacteria, soil, sunlight, Rocks

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

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%

What can happen to an enzyme as tempature rises