Answer:
ya ever heard of role reversal......
<span>A client who is unable to speak logically or follow directions, with the added information from his family that the client has been under a great deal of stress for about 6 months, then more than likely the client is experiencing exhaustion. Exhaustion is a state of extreme physical or mental fatigue.</span>
Im not 100% sure but the best answer I can give is Prokaryotes because they came to be around the time oxygen did as well.
<span> C - nitrogen fixation, ammonification and nitrification </span>