Answer:
The answer is D.
Explanation:
Cellular respiration requires glucose and oxygen to form carbon dioxide and water.
Equation:
Glucose + Oxygen → Carbon dioxide + Water
C6H12O6 + 6O2 → 6CO2 + 6H20
Because lung transplants can easily fail and most of the time lungs are so vulnerable to infection.
brain is the organ which does play a role in mechanical or chemical digestion
Virbrant energy it is used also make glucose
All of the above points are valid for fossils' contributions in understanding the process of evolution. They allow us to study the ancestry, we can see the homologous organs or structures, if fossils are well-preserved; different fossils can lead us to follow the cycles of the changes that occurred during macroevolutions, and fossils can be used to study different populations which had different body structures for surviving in different environmental conditions.
