Deficiency in what vitamin can result in a condition called scurvy?

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Which spheres are involved when sedimentary rocks formed from parts of seashells at the bottom of the ocean? a.) biosphere, atmosphere, geosphereb.) geosphere, hydrosphere, biosphere c.) geosphere, exosphere, hydrosphered.) hydrosphere, biosphere, atmosphere

What is any method of measuring the age of an object or event in years, such as using atomic half-life?