Two different fish species, the Arctic cod and Antarctic toothfish, are separated by great distance. Although they are not genetically related, both produce a similar protein that prevents them from freezing in cold
waters. What is the best explanation for the similarities between these two fish?

a chair, a bed, and a toothbrush

explanation:

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.