About the geologic time scale divisions
The geologic history of the Earth is broken up into hierarchical chunks of time. From largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages.
Are you talking about the benthic zone?
Yes your answer to this question is B. So you are correct.
The region on the neuron where action potentials are generated is called the trigger zone. It<span> is an area of the medulla oblongata that receives inputs from blood-borne drugs or hormones, and communicates with other structures in the vomiting center to initiate vomiting.</span>
