Due to the need to have completely controlled experiments to test a hypothesis, science can not prove everything. For example, the scientific method cannot alone say that global warming is bad or harmful to the world, as it can only study the objective causes and consequences.
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>
C. A vertebrate because a vertebrate animal has a backbone. :)
Hope this helps! ;)
It has no definite nucleus but a region containing chromosome called nucleoid.