While walking home on a dark night, joanna saw a bright light in the sky and concluded that it must have been a spaceship from another planet. which of these questions could joanna answer using scientific methods of investigation? a) can aliens read our minds? b) does joanna actually believe in aliens? c) what is the aliens spacecraft made from? d) what percent of people in the area saw a bright light that night?

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.