Which is not a particle within an atom? an ion an electron a proton a neutron

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

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above

What organ is the first to receive nutrients that have been absorbed from the digestive tract?