EVALUATION

The Evaluation exercise closes the chapter with ten items. The first five are single-best-answer MCQs testing DPD/turgor-pressure arithmetic in a fully turgid cell, the correctness of statements about the apoplast, symplast and transmembrane water routes, the type of transpiration possible in a leafless xerophyte like Opuntia, the ion movement (K+ influx) that opens stomata, and the driving force behind Munch's mass flow hypothesis. The next four are short descriptive questions asking students to explain physiological drought caused by excess soil salt, describe phosphorylase's role in the starch-sugar interconversion theory of stomatal opening, list the non-photosynthetic sink organs that depend on an imported sucrose supply, and name the parameters that control water potential. The final item is a figure-based problem describing an artificial osmotic cell in a beaker and asking st …