What are diatoms?why they are useful for us
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Diatomaceous earth is used as a pest repellent. ... As diatoms are made from silica this makes diatomaceous earth very abrasive, and so the sharpness enhances the particles as a pesticide2. Diatoms are also useful in forensic studies. If a person has drowned then diatoms are able to enter the human body....................
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Answer:
Diatoms (diá-tom-os 'cut in half', from diá, 'through' or 'apart'; and the root of tém-n-ō, 'I cut'.) [10] are a major group of algae,[11] specifically microalgae, found in the oceans, waterways and soils of the world. Living diatoms number in the trillions: they generate about 20 percent of the oxygen produced on the planet each year,[12] take in over 6.7 billion metric tons of silicon each year from the waters in which they live,[13] and contribute nearly half of the organic material found in the oceans. The shells of dead diatoms can reach as much as a half mile deep on the ocean floor, and the entire Amazon basin is fertilized annually by 27 million tons of diatom shell dust transported by east-to-west (easterly) transatlantic winds from the bed of a dried up lake[14] once covering much of the African Sahara.[