The diagram below shows the early embryos of a fish, reptile, and bird. What evidence do you see could be used to determine relatedness? What is the name given to the study of the similarities and differences in embryos of different organisms? What evidence in adult fish, reptiles, and birds would show relatedness?

1. the energy lost to disorder metabolism     -entropy

2. related to or possessing motion potential     -kinetic

3. all of the chemical reactions in an organism required for maintenance of the processes of life entropy     -metabolism

4. possible; ability to go into action or perform work kinetic     -potential

5. the study of energy and its transformations thermodynamics     -thermodynamics

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.