**Water potential ($\psi$)** of pure water is:
AZero (and adding solutes makes it negative)
BAlways positive
CEqual to 1 atm
DCannot be determined
Answer & Solution
Correct answer: A. Zero (and adding solutes makes it negative)
Water potential of pure water at STP = 0 by convention. Solutes lower it (more negative). Pressure (turgor) raises it. Water flows from high (less negative) to low (more negative) water potential.
Related questions
Loss of water as **vapour** (transpiration) is highest in which type of tissue/structure oWhich plant has **epistomatic** leaves (stomata only on upper surface)?**Symplast pathway** of water movement involves:Why does **rate of transpiration increase** with rising temperature, low humidity, and winIf a plant cell has OP = 12 atm and TP = 4 atm, its **DPD** is:**Aquaporins** are:The **pressure-flow hypothesis** (Münch, for phloem transport) proposes that:The **major channel** for translocation of food (sucrose) in plants is: