How does the male reproductive system differ from the female reproductive system

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

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.

What are characteristics of minerals? select 3 choices