3. relatively high concentrations of organic nutrients. Both 1 and 3 are correct. Water entering the stele of the root from the cortex must pass through the a. Casparian strip. C. endodermal cytoplasm. Arrange the following five events in an order that explains the mass flow of materials in the phloem.
Water diffuses into the sieve elements.
Leaf cells produce sugar by photosynthesis. Solutes are actively transported into sieve elements. Sugar is transported from cell to cell in the leaf. Sugar moves down the stem. Assume a particular chemical interferes with the establishment and maintenance of proton gradients across the membranes of plant cells.