Well to begin with this process is called genetic engineering, the scientists altered the DNA of the chickens instead of altering a protein already in the chickens because when you alter the DNA the offsprings  of the chicken will will have the same qualities while if you only alter the protein already in that chicken only that chicken will be able to do the job 
        
             
        
        
        
Answer:
Here are the options to complete the question
A. Fenestrated capillaries
B. continuous capillaries
C. sinusoids
D. anastomoses
A. Fenestrated capillaries is our Sure ANSWER
Explanation:
Fenestrated capillaries (is located wherever active capillary absorption or filtration occurs)
The renal glomerulus - a network of capillaries - can be identified as fenestrated capillaries aiding the diffusion of small molecules and small amount of protein into the blood stream. 
 
        
             
        
        
        
That is because being prokaryotic or eukaryotic doesn't depend on the size of the organism, but rather on the cellular structure. Both are eukaryotic because they have clearly defined nuclei and functioning organelles that are differentiated, unlike prokaryotic organisms.