Which process made an increase in chemical energy for cell activities in organisms living on the earth possible?
a change from a primitive atmosphere, which was about 70 percent nitrogen, to
an atmosphere that was 70 percent oxygen
the development of plants that could add more water vapor to the atmosphere,
increasing the earth's water supply
the discovery of ATP and ADP by scientists for use in the metabolic processes of
cells
a change from a reducing atmosphere where there was no free oxygen to an
oxidizing environment where free oxygen was abundant

cuz they cant breath

explanation:

they deliver oxygen to the blood

how do heroes resolve conflicts in beowulf?

question 15 options:

they sue each other in court

they get a mediator

the seek counseling

they get even or take revenge

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.