What term describes an early kind of biologist who made and recorded observations about organisms in nature?

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

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.

Explain the significance of thesaurus geographicus