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.
Answer 1) All green plants that do photosynthesis in Sunlight give out Oxygen during the day time. Plants that do not do photosynthesis never give out Oxygen. There is an intimate connection between the evolution of Oxygen through plants and photosynthesis.nswer 2) All living organisms including plants do respiration all the time. Respiration stops only when life is extinguished. So it is a wrong notion that Plants give out CO2 only at night. They do it all the time. They take in Oxygen like all of us and give out Carbon dioxide all the time like us.