What molecules are
carbon atoms in
before the chemical
change?

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

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins