12. a dog pants because a. evaporation causes cooling b. evaporation gets rid of excess water in the body c. it is tired d. panting to raise body temperature.

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

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.