Answer: Mitochondria
Explanation: The mitochondria make energy within the cell
The neuron releases chemical messengers. Otherwise, there would be no 'signal transduction' in the postsynaptic cell. So, your answer is B.
Notchochord, morphology, chordates
How is controlling wide spread/contagious diseases made difficult by the fact that it spreads through multiple species of animals?
(is it still too complicated?)
