Post category:Everyday Science Mcqs Post comments:0 Comments The source of oxygen in photosynthesis is _____. A. water B. salts C. minerals D. glucose Read more articles Previous PostThe gas, commonly known as “laughing gas”, is ____. Next PostThe instrument used to measure wind speed is____. You Might Also Like The principal constituent of the atmosphere of the Earth is? March 10, 2022 Which is the largest planet of Solar System? May 9, 2020 There are _____ methods of heat transfer. March 10, 2022 Where is blood formed in the human body? May 22, 2022 Where Bermuda Triangle is situated? July 8, 2020 The nearest planet to the Sun is____. March 10, 2022 Leave a Reply Cancel replyCommentEnter your name or username to comment Enter your email address to comment Enter your website URL (optional) Save my name, email, and website in this browser for the next time I comment. Δ