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.
Plants breathe using a system called respiration. They release carbon dioxide and take in oxygen from the air around... Plants breathe using a system called respiration. They release carbon dioxide and take in oxygen from the air around them. Plants, unlike other living things, can produce their own oxygen in a process called photosynthesis. Photosynthesis is the opposite of respiration. In photosynthesis, plants' carbon dioxide is absorbed by the plant and from that, oxygen is produced.Plants respire all the time, day or night. However, they only photosynthesize during the day, when the sun is out. Every part of a plant breathes.