In which two layers of the atmosphere are temperatures generally warmer at higher altitudes? A- mesosphere and troposphere
B- troposphere and stratosphere
C- mesosphere and stratosphere
D- stratosphere and thermosphere

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation

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.

c.           is the correct answer