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They break down dead organisms and recycle nutrients. They directly help to maintain the population sizes of different predators. They primarily eliminate toxins from the water that can harm phytoplankton.
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Hope it helps I found it on brainly
It gets polluted from fertilizers or any spilled chemicals. And those chemicals get obsorbed into the ground. And the gravity pushes them deeper in the soil, till it reaches the underground water (or aquifer)
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Dominance of an allele does not make it more frequent in the population.
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• The search for gold became an obsession with the Spanish. England, France and other European Nations were in search of riches too, but they tended to focus more on getting rich by way of trade.
Hernan Cortes was the man who conquered the Aztecs. His main reason of going to the America's was for gold.
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The preservation of biodiversity provides a vital link to critically expand the molecular diversity necessary for successful drug discovery efforts in the future. ... This ongoing loss of biodiversity is altering ecosystem functions and the ability to provide goods and services for human health and well-being
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