The structure that controls loss of water vapour during transpiration is labelled? By: Sunday|Published on: Sep 8|Categories: Biology JAMB| 0 comments A. l B. ll C. lll D. lV Correct Answer: Option D – lV Users Also Read These:Water vapour is lost in plants during transpiration through?The function of the part labelled II is that it controls Excess water in plants is excreted as water vapour…The mass of water vapour in a given volume of air is…The mass of water vapour in a given volume of air is…SEE ALSO The distribution of plants in a rain forest is governed mainly by?