This course explores how plants function. Topics include water transport and the soil-plant-atmosphere continuum, photosynthesis and carbon resource utilization, nitrogen nutrition and symbioses, photosensing, and responses to environmental stresses such as attack by pests and pathogens. Laboratories introduce both classical and contemporary methods in plant physiology. Prerequisites: BIOL 107; CHEM 101 or 164 or 261; and a 200-level Biological Sciences course or PL SC 221. Credit cannot be obtained for both BOT 340 and 540. SCI 100 may be used in lieu of BIOL 107 and CHEM 101.