A substance has a pH of 7. Which of the following descriptions matches this
pH?

A. It is very acidic.

B. It is very basic.

C. It is slightly basic.

D. It is neutral.

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

Solutions to environmental problems in europe must

How many copies of genes do gametes have?