2. These are organic macromolecules e.g. Carbohydrates, fats and proteins.
Protective principles of food :
1. These do not provide energy.
2. These are micromolecules both organic and inorganic molecules just as vitamins, minerals and water.
Diphyodont is the condition of having two set of teeth during the life of an organism. For example : humans are diphyodont as they have two set of teeth namely temporary milk or deciduous teeth which are replaced by permanent or adult teeth.