<span>Aplysia is a marine gastropod mollusc which is an often used model organism in neuroscience, especially on the cellular biology of learning and memory. What makes them easy to work with are their giant neurons, which are one of the largest. Aplysia neurons are suitable for studies of how neurons and neural circuits control behaviours. Its defensive reflex has been studied because it is mediated by electrical synapses, which allow several neurons to fire synchronously.</span>
It is <u>TRUE</u> that multiple polypeptides joined together represents the tertiary level of protein organization.
The environment is your correct answer<span />
Alphonse Bertillon was a French criminologist who first developed this anthropometric system of physical measurements of body parts.
