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Purine salvage reactions
Structure of Limbs
The anatomical composition and arrangement of bones, muscles, and joints in the extremities of an organism.
Carbon Isotope
Carbon isotopes are variants of carbon atoms that differ in the number of neutrons, notably carbon-12, carbon-13, and carbon-14, where the latter is often used in radiocarbon dating to determine the age of archaeological samples.
Geological Events
Natural occurrences such as earthquakes, volcanic eruptions, and plate tectonics that shape the earth's surface and environment.
Living Organisms
Entities that exhibit the characteristics of life, such as growth, reproduction, and the ability to respond to their environment.
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