The by-product in plant photosynthesis is? by Sunday | Jun 8 | Agricultural Science WAEC | 0 comments A. carbondioxide B. carbohydrate C. hydrogen D. oxygen Correct Answer: Option D – oxygen Users Also Read These:If the cross of a red-flowered plant with a white…A pupil accidentally "watered" a potted plant with…A small stem from a hibiscus plant was placed in a…The first stable product of photosynthesis is?The difference between the gross domestic product…