How do electrons gain energy in photosystem 1?

a. they absorb photons.
b. they use energy in the form of glucose.
c. they take energy from atp molecules.
d. they use energy from a hydrogen ion pump.

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.

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.