I think the 4 major types of vectors are plasmids, viral vectors, cosmids, and artificial chromosomes. The most commonly used vectors are plasmids.
Hope this helps! ;0
        
                    
             
        
        
        
How this can be prevented/can vaccines help?
What age group is at risk?
Could it be lethal?
Why does this virus happen?
        
                    
             
        
        
        
The following are the types of nervous system and their functions.
1. Parasympathetic- functions as the relaxing response.
2. Sympathetic - functions as the flight and fight response.
3. Autonomic - it functions as the controller of automatic response.
4. Somatic- functions as controling voluntary response.
5. Peripheral- works as motor nerves and sensory which runs from and to central nervous system.
6. Central- works as the main interpretation and center of processing.
 
        
                    
             
        
        
        
Answer: D. at most 10
Explanation:
Using the energy pyramid, the ratio of grassland to primary consumer to secondary consumer is: 100:10:1 respectively. 
Thus if the grassland supports 100 cattle (primary consumer), the numbers of humans (secondary consumer) the cattle can feed will be;
100/10 = 10.
 
        
             
        
        
        
Answer:
A
Explanation:
If Im wrong pls correct me, I hope it will help