Which is a role of helpful bacteria.

A-removing nutrients from soil
B-producing oxygen
C-healing sick animals
D-preventing tooth decay

I think it’s b
but I’m not sure

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.

a- multicellular

b-eukaryotic

c-no cell wall

d-heterotrophic

e-autotrophic