Why is it important that scientists create man-made neurons for people who were not born with a fully-functional nervous system?

answer: 20 percent

the fish culture has become a developing commercial practice in developing countries which is already prominent in developed countries of the world. the major fish protein demand is being supplemented in developing countries is   fishing to meet the needs of the growing population. therefore, in some developing nations, the percentage of animal protein from fish in the diet can be as high as 20 percent.

not sure if this is what you'r looking for prokaryotes have organelles hope this out at least.

i think it's organizational.