Explain how photosynthesis and respiration are linked in order to provide you with energy from the food you eat:
Photosynthesis is the process in which certain life forms are able to use sunlight to create energy. This energy is created by making carbohydrates from carbon dioxide and water in the presence of chlorophyll. Plants release large amounts of oxygen into the atmosphere as they produce much more than needed during the photosynthesis process.
Aerobic respiration is an important process in life as we know it. This process further breaks down molecules and sugars using oxygen. During this process adenosine triphosphate (ATP) is created, used to store and transfer energy to cells throughout the body. (Aerobic respiration, 2010)
Photosynthesis and aerobic respiration are both needed for each other to be able to perform their primary functions. One without the other would not work properly. Between both of these processes we receive three main sources; water, carbon dioxide and oxygen. Plants and animals require all three of these in order to live. Carbon dioxide and oxygen are a lot like a circle. Animals need oxygen to live and emit carbon dioxide, while plants need carbon dioxide to produce carbohydrates and omit oxygen, thus completing the circle. (Photosynthesis, 2005)
During the photosynthesis stage a plant produces oxygen that aerobic respiration will use in order to break molecules, during this process electrons are released creating energy and a substance called adenosine triphosphate (ATP) is created. Through ATP, complex molecules are broken down into simple ones, allowing them to be used appropriately. (Photosynthesis, 2005) In the absence of oxygen some cells and organisms can use glycolysis coupled to fermentation to produce energy from the sugar created by photosynthesis:
Fermentation allows for the production of energy without oxygen using organic compounds. Fermentation produces ATP...