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Explain how isotope ratios can be used to indicate the type of organism present in an ecosystem.
Work
A physical or mental activity performed to achieve a purpose or result, often associated with employment or labor.
Socioeconomic Status
A measure of an individual's or family's economic and social position in relation to others, based on income, education, and occupation.
Educational Attainment
Is the number of years of schooling successfully completed or, for higher learning, the degrees or certificates earned.
Marx
Karl Marx, a 19th-century philosopher, economist, and revolutionary, known for his theories about capitalism and communism.
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