Answer:
tunica media hope this helps
 
        
             
        
        
        
The scientific field of study that examines the relationships between biology and psychology, and how they influence behavior and cognition. For example, biopsychology examines topics such as how your eyes are able to inform your brain what you are reading, how the brain interprets this information, and how your brain communicates with your hand to move the mouse and click on different links.
https://study.com/academy/lesson/what-is-biopsychology-definition-basics.html
        
             
        
        
        
Answer:
-  Interruption in the genetic flow between separated groups
- The emergence of new mutations in each of the groups, and their accumulation in time. Slow and gradual differentiation between populations. 
- Genetic divergence by natural selection and reproductive isolation 
- Prezigotic isolation mechanisms 
Explanation:
Allopatric speciation consists of the geographic separation of a continuous genetic background that can give place to two or more new geographically isolated populations. These separations might be due to migration, extinction of geographically intermediate populations, or geological events. In this speciation, some barriers impede genetic interchange, or genetic flux, as the two new groups that are separated can not get together and mate anymore. These barriers might be geographical or ecological. 
The process of allopatric speciation involves different steps that affect organisms:
- The emergence of the barrier. 
- Interruption in the genetic interchange
- The occurrence of new mutations and their accumulation in time in each population. Slow and gradual differentiation. 
- Genetic divergence by natural selection and reproductive isolation makes it impossible for the two groups to mate even if the barrier disappears. 
- Prezigotic isolation mechanisms will be favored by selection if occurs a secondary contact between the new species in formation. 
 
        
             
        
        
        
 Answer:
D. The nerves exit the central nervous system in the head and from the lumbar spine.
Explanation:
The preganglionic neurons transmit the nerve impulses through the cranial or spinal nerves that arise from the brain, to the postganglionic neurons from where the nerve fibers that relay these nerve signals to the different viscera and effector organs, located along the spinal cord