Balanced diet : A diet that contains the proper proportions of carbohydrates, fats, proteins, vitamins, minerals, and water necessary to maintain good health. A diet containing all the essential food constituents in proper proportions so that the need for calories, minerals, vitamins and other nutrients are met with is called as balanced diet. It varies according to age and the amount of work.
A balanced diet should have following three qualities :
1. It must be rich in various essential nutrients like vitamins, minerals and some amino acids.
2. It should provide just enough raw materials needed for growth and development, repair and replacement of cells, tissues and organs of the body.
3. It should provide the necessary energy required by the body.
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.