In order for most chemical reactions to occur in living things what inorganic substance must be present?

Match the digestive enzymes to the macro molecules they to digest. down fats into glycerol and fatty acids down carbohydrates into simple sugars down nucleic acids into nitrogenous bases and simple sugars down proteins into amino acids

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Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?