A plant developed a mineral deficiency after being treated with a fungicide. What is the most probable cause of the deficiency?
A) Mineral receptor proteins in the plant membrane were not functioning. B) Mycorrhizal fungi were killed. C) Active transport of minerals was inhibited. D) The genes for the synthesis of transport proteins were destroyed. E) Proton pumps reversed the membrane potential.
The value for Ψ in root tissue was found to be -0.15 MPa. If you take the root tissue and place it in a 0.1 M solution of sucrose (Ψ = -0.23 MPa), the net water flow would
A) be from the tissue into the sucrose solution. B) be from the sucrose solution into the tissue. C) be in both directions and the concentrations would remain equal. D) occur only as ATP was hydrolyzed in the tissue. E) be impossible to determine from the values given here.