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is the supply of materials, in the form of food, required by organisms and cells to stay alive.
fats that are liquid at room temperature. They are found in plants.
the blood vessel that carries blood from the liver to the inferior vena cava.
a chemical used as an antiseptic to prevent bacterial and fungal growth.
the difference between the concentrations of a specific molecule in two adjacent areas.
an antigen preparation that stimulates the immune system to give protection against a particular...