Examlex
Marginal cost equals average total cost at the _____ of the average total cost curve.
Middle-latitude Grassland
Ecosystems located between the tropics and polar regions, characterized by large expanses of grasses, few trees, and distinct seasonal temperature variations.
Polar Regions
Areas surrounding the Earth's geographical poles, characterized by extreme cold, ice, and unique ecosystems sensitive to climate change.
Indicator Species
Organisms used to assess the health of an ecosystem or the presence of environmental conditions such as pollutants due to their sensitivity to changes.
Indicator Species
Species that reflect the ecological condition of an environment, often used to monitor environmental health or pollution levels.
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