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…A decrease in the demand for a product X resulted in…A pupil accidentally "watered" a potted plant with…The first stable product of photosynthesis is?Which of the following is considered to be the first…