It was necessary for life to exist on Earth, that organisms’ possess the ability to pass, store, and pass on molecular information to the next generation develop. The two molecules capable of these two processes are RNA and DNA. What probably accounts for the switch to DNA-based genetic systems during the evolution of life on Earth?

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.

yes it is weird but true

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it