The structure that controls loss of water vapour during transpiration is labelled? by Sunday | Sep 8 | Biology JAMB | 0 comments A. l B. ll C. lll D. lV Correct Answer: Option D – lV Users Also Read These:The mass of water vapour in a given volume of air is…A tap supplies water at 26°C while another supplies…The mass of water vapour in a given volume of air is…The function of the part labelled II is that it controls A tap supplies water at 30°C while another supplies…