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:Which of the following is considered to be the first…When the marginal product is negative, the total…The product cost that does not form part of the…If the cross of a red-flowered plant with a white…Which of the following is considered to be the first…