Doctors often count the amount of lymphocytes in a person's blood to see if he or she has certain illnesses. Why would this be a useful test ?

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

carbon atoms, hydrogen, oxygen, and nitrogen.

1. is geographic distribution

2 is increasing complexity

3 is transitional forms

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.