Mass and atoms
Two things that make up a solution is a solvent and a solute.
Found in two of the amino acids that make up many proteins
Calcium does not build up on gums, you are confusing it with plaque. And yes, you have to remove plaque from your gums, because it allows the growth of bacteria which can be very harmful to your gums.
NitrogenOxygen
There are two things that make up fermentation. The two things that make up fermentation are lactic acid and propionic acid.
Two things that make up a climate would be the temperature and the precipitation in a certain amount of time. This is true for all climates.
culture and climate
clay and sand
speed and direction
Mass and atoms
Two things that make up a solution is a solvent and a solute.
If the organ in question is the heart, we can conveniently divide up the heart into the two atria and the two ventricles. Not all organs can be easily analysed in terms of two things. Organs are actually made up of lots of things.
The protons and the neutrons.
phospholipids and embedded
Celluose fiber and proteins
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