Strategies for writing an effective introduction. Start by thinking about the question (or questions) you are trying to answer. Your entire essay will be a response to this question, and your introduction is the first step toward that end.
A: Plants release oxygen as a by-product of photosynthesis, a process in which carbon dioxide is converted into sugar. The sugar is then used as an energy source for the plant. When oxygen is produced through photosynthesis, it is released by the plant into the atmosphere. The sugars produced by photosynthesis are utilized by combining them with oxygen through a process called oxidation. Photosynthesis chemically converts sunlight into energy after being collected by special cells in their leaves known as chloroplasts.
The oxygen so released is used in the respiration process to break down complex molecules (generated in photosynthesis) and releases energy in the... Photosynthesis is the process in which light energy of the sun is converted to chemical energy. The process also consumes carbon dioxide from the atmosphere and we end up with glucose and oxygen. It is this process which makes plants so special as the chief source of food and oxygen on Earth.