Cytosine makes up 42% of the nucleotides in a sample of dna from an organism. approximately what percentage of the nucleotides in this sample will be thymine? a 8% b 31% c 42% d 16%

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