Examlex
Express the sum using summation notation. Use 1 as the lower limit of summation and i for the index of summation.
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Cline
A gradual change in certain characteristics exhibited by members of a species over a geographical area.
Hormone-disrupting Chemicals
Substances that interfere with the normal functioning of the endocrine system, potentially causing developmental, reproductive, neurological, and immune problems.
Human Health
Overall state of physical, mental, and social well-being for individuals or populations, not merely the absence of disease.
Racism
A doctrine of superiority by which one group justifies the degrading of others based on their distinctive physical characteristics.
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