Which animal is most likely to have an open circulatory system? A. Crab
B. Bird
C. Dog
D. Lizard

answer; i believe that the correct answer is ; males are hemizygous for the x chromosome;

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.