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Figure 2-14
-Refer to Figure 2-14. Consider the production possibilities frontier for an economy that produces only sofas and cars. As the economy moves from point A to point D, is the opportunity cost of cars increasing, constant, or decreasing?
Australopithecus Afarensis
An extinct hominin species known for the famous fossil "Lucy," significant for understanding early human evolution.
Homo Erectus
An extinct species of early human that lived throughout most of the Pleistocene geological epoch, known for its ability to walk upright.
Homo Habilis
An extinct species of early human that lived approximately 2.4 to 1.4 million years ago, known for using stone tools.
Four-chambered Heart
A type of heart structure found in mammals and birds, consisting of two atria and two ventricles, allowing for efficient separation of oxygenated and deoxygenated blood.
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