These 10 animal facts will amaze you. The face of farming and agriculture has changed drastically over the past 100 years. At the beginning of the 20th century, over 70% of the population of the United States lived and worked on farms, but by 2008, the figure had dropped to less that 3%.
During this process, glucose from food is broken down into carbon dioxide and water, and energy is released. The process of releasing energy from food is called respiration, or cellular respiration as it is a series of steps that take place within living cells. It is important to not confuse respiration, or oxidizing glucose, with breathing.
I. Cellular Respiration: breaking down sugar in the presence of oxygen (aerobic). Photosynthesis (you recall...) is the process by which CO2 and H2O are used to make sugars and starches. During Cellular Respiration, sugar is broken down to CO2 and H2O, and in the process, ATP is made that can then be used for cellular work. The overall reaction for cellular respiration: (does this