Which principle states that animals succeed each other in a definite sequence?

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.