This question is on Brain Pop: 1. What is the relationship between these structures? (The two pictures in the screenshot)
2. Where is each structure located?
3. Why does DNA need to be coiled?

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.

and after water is usually warmed by the sun the water temperature raises and then evaporates .