Examlex
A hormone is able to stimulate more cells than a neurotransmitter.
Minerals
Naturally occurring, inorganic solids with a definite chemical composition and a crystalline structure, found in rocks and the Earth's crust.
Quartz
A hard, crystalline mineral composed of silicon and oxygen atoms, widely used in jewelry and electronics.
Halite
Also known as rock salt, a mineral form of sodium chloride (NaCl) that often occurs in evaporite deposits.
Crystal
A solid material whose atoms are arranged in highly ordered, repeating patterns extending in all three spatial dimensions.
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