<span>The measles, mumps, and rubella vaccine is the live, weakened measles virus. The vaccine is made from an attenuated form of the virus and combined with protein or small viruses and bacteria extracted from the virus. Nucleic acid vaccine is a vaccine that is attenuated whole-agent vaccine.</span>
        
             
        
        
        
The human gene for insulin production is identified and removed using enzymes called restriction enzymes. The same restriction enzymes are used to cut open a plasmid (a small, circular section of DNA).
        
             
        
        
        
Answer:
The doldrums are commonly found around the equator. The doldrums are an area characterized by calm monotonous weather.   
 
        
             
        
        
        
Answer: D. a genetic bottleneck
Explanation:
A genetic bottleneck also known as a population bottleneck is one that describes a sharp reduction in the size of a population caused by environmental events like in the above or caused by human activities.