Answer is
A) Electrón trasport chain
Well it would be an example of homeostasis. As it's trying to control and reestablish your body back to normal. <span />
The correct answer is d. 3.5 billion years.
Prokaryotes were the first forms of life on Earth long before simple multicellular life appeared because of their ability to withstand extreme conditions. It is believed that the first living forms were bacteria combined with archaea in the microbial mat (multi-layered sheet).
