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.
  Actually plants do use oxygen and produce carbon dioxide. Plants â¦ need oxygen and glucose to respire (get energy). The key difference between plants and animals is that plants get their glucose by sticking carbon dioxide molecules and water molecules together, producing glucose and oxygen.OWEVER, Plants generally produce a NET NEGATIVE amount of carbon dioxide. Animals br â¦ eathe in Oxygen, use this to burn stored energy and perform work within the body, and in the process bond the oxygen to carbon producing carbon dioxide which is exhaled.