Describe characteristics that are found on plant cells

Indica el nombre y la fucion de los vasos sanguineos que entran y salen de los riñones

What is thought to have caused the mass extinction at the end of the cretaceous period?

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