For example, the World Health Organization recommends keeping added sugar intake to 10% of total calories. For the average 2000 calorie-diet that's a maximum of 50 grams. The American Heart Association recommends 6 teaspoons of sugar for women and 9 for men (1 teaspoon of sugar has about 4g of sugar).
In developmental biology, cellular differentiation is the process by which a less specialized cell becomes a more specialized cell type. Different tissues have different kinds of cells.
Definition - What does Cellular Respiration mean? Cellular respiration is a series of metabolic reactions that occur within the cells of organisms (both plants and animals) to convert biochemical energy derived from nutrients to adenosine triphosphate (ATP) and then release waste products.