. List the three separate places that frogs can exchange oxygen for carbon dioxide:
a. Cutaneous respiration occurs on the surface of the __
b. Bucco pharyngeal respiration occurs in the lining of the __
c. Pulmonary respiration occurs in the alveoli of the __

c

explanation:

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.

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.