Competitive relationships are only seen within a particular population true or false

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

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.

Which describes the habitat of a frog?