Question

2. You have learnt that plants respire, so they use up oxygen and give out carbon dioxide. You also know that plants are considered helpful because they use up carbon dioxide and produce oxygen during the process of photosynthesis. How do you think the two things fit? Is it that plants return (to the air) at least a part of the oxygen they use up or is it that they produce more oxygen than they use up? ​

Answer 1

Answer:

oxygen and nitrogen gas