19) Which role of protists has the most positive effect on maintaining that plant population in an
ecosystem?
A. Protists are a major food source for animal
B. Protists produce approximately 75% of the oxygen on the Earth.
C. Protists decompose dead materials, returning nutrients to the soil.
D. Protists found in the gut of animals assist in digestion.
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Which role of protists has the most positive effect on maintaining the plant population in an ecosystem? Protists are a major food source for animals. ... Bacteria in improperly prepared food is consumed by humans, causing food poisoning.
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