Oxygen is a reactant in the formula for cellular respiration and it is needed to make what?
ATP
Answer:
All the water that is on earth today is the water that has been on the planet. Freshwater is a million years old. The same water is flowing in a continuous loop in the form of falling as rain and snow from the clouds to the earth’s surface. Running in rivers and ponds. This is due to the water cycle. The cycle where the water evaporates in the atmosphere and is from the atmosphere and then cloud loses the water as rain or snow.
The first one is the 3rd option and the 2nd one is also the 3rd option