Glucose provides energy that can quickly be used to generate ATP if needed by muscle cells. Starches have to be hydrolyzed to make glucose molecules so they would be useful for endurance situations
Enters the left atrium...this is the oxygenated blood from the lungs (pulmonary)
Natural selection means that the organisms better adapted to their environment, that is, they have developed the right characteristics/skills/response to the external ambient, have higher chance to survive, making the next generations genetically inherit such acquired surviving characteristics.
These generations will thus have a higher chance of survival, making these species being "naturally selected" as survivors, while those who haven't or are slower in this process, have a higher risk of elimination.
Answer:
Both A and B
Explanation:
Burning fossil fuels produces carbon dioxide.
Cellular respiration produces carbon dioxide.
Both produce carbon dioxide.
Both A and B.
