Question

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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

Answer 1

1.The shells make up the diatomaceous earth used in filters

2.It can be used as an ingredient in abrasives

Step-by-step explanation:

Pinularia, Navicula, Fargilaria are some of the diatoms. These are included in the family Bacillariophyceae. They are unicellular, eukaryotic aquatic both freshwater and marine organisms having extremely beautiful silica shells or frustules. The diatoms are autotrophic and are a good source of food for marine organisms. Diatoms have very wide fossil record as some rocks are formed of fossil diatoms. They are called diatomite or diatomaceous earth. The deposits of diatoms are mined commercially as abrasives. It is used in filters to remove unwanted material from drinking water.