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IceJOKER [234]
4 years ago
7

Check all that apply

Biology
1 answer:
alexira [117]4 years ago
8 0

Answer:

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

2.It can be used as an ingredient in abrasives

Explanation:

<em>Pinularia</em>, <em>Navicula</em>, <em>Fargilaria</em> 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.

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