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? Check all that apply
The shells make up the diatomaceous earth used in filters
They are used in food products
The shells can be used in some insulating materials
It can be used as an ingredient in abrasives
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Which beat describes the brain stem

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home.what is displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

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