29Plant Structure TransportMedium1 markWhat determines the rate of water movement from the roots to the leaves of a plant on a hot, sunny day?Atransport of water through the apoplast of the endodermisBdevelopment of a less negative water potential in the leavesCchanges in the specific heat capacity of water in the leavesDevaporation of water from the mesophyll cell wallsGrade answerGrading criteria