Examlex
Darwin believed that emotional expressions began as __________ that came to have evolutionary value because they __________.
Stabilizes
Refers to making something more steady or firmly fixed in place, or making a chemical compound resistant to change.
Buffer
A solution that resists changes in pH when acid or alkali is added, mainly composed of a weak acid and its conjugate base.
Chemical Equation
A symbolic representation of a chemical reaction, showing the reactants, products, and, in some cases, the direction of the reaction.
Carbon Dioxide
A clear, unscented gas resulting from the burning of carbon-containing compounds and the act of respiration, which plants use in the process of photosynthesis.
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