Hey there!
The answer is hydrogen.
Hydrogen is the most abundant element in the <em>universe</em> and is part of the atomic makeup of most celestial objects and even ones on Earth.
Hope this helps!
Hydrogen bonds between nucleotides
Anaerobic exercise is one situation that would cause a buildup of lactic acid in human muscle cells. As the cells switched over from aerobic respiration to fermentation in order to produce ATP, lactic acid would be produced in relatively large quantities as a byproduct. This allows NADH and FADH2 electron carriers to be oxidized without the electron transport chain and would allow Glycolysis to continue.
I believe a valley or mountain, but I am not 100 percent sure.
If Green house gases continue to rise, their amount of heat trap will also continue & our Planet would become hotter & hotter which can lead to very dangerous situation for us.
Hope this helps!
