They can identify disorders and diseases from DNA
Answer:
Oxygen
Explanation:
The formula for cellular respiration is oxygen + glucose -> water, carbon dioxide, energy. You can already cross out A and D because they aren't in the formula, so you have two left, water and oxygen. The reason why it is oxygen and not water is because without oxygen you can't even have water. also, I just got this right on my test :-)
Using a molecular<span>, scientists are able to estimate the amount of time that two species have been evolving independently.</span>lecular
D: food availability for the moose and disease for the wolf
