It is not a mystery it is the gas piping out of your joint when you pop them if you push down on them. If you pull on your fingers then it is your joint being pulled out and put in. If you push on your fingers it is better than pulling because pulling can cause joint damage.
E)Krebs cycle/ cristae of mitochondria
Krebs cycle occurs inside the matrix of the mitochondria. Electron transport chain takes place in the cristae.
Homeostasis- The ability of the human body to maintain its normal state.
Answer:
It provides the cells with oxygen
I would say photosynthetic bacteria are the most important, because if they disappeared most of the oxygen in the atmosphere wouldnt be here and complex life like humans wouldnt exist
